Quantitative and qualitative evaluation of sequential PET/MRI using a newly developed mobile PET system for brain imaging
AbstractPurposeTo evaluate the clinical feasibility of a newly developed mobile PET system with MR-compatibility (flexible PET; fxPET), compared with conventional PET (cPET)/CT for brain imaging.MethodsTwenty-one patients underwent cPET/CT with subsequent fxPET/MRI using18F-FDG. As qualitative evaluation, we visually rated image quality of MR and PET images using a four-point scoring system. We evaluated overall image quality for MR, while we evaluated overall image quality, sharpness and lesion contrast. As quantitative evaluation, we compared registration accuracy between two modalities [(fxPET and MRI) and (cPET and CT)...
Source: Japanese Journal of Radiology - February 28, 2021 Category: Radiology Source Type: research

Computer-aided detection of cerebral aneurysms with magnetic resonance angiography: usefulness of volume rendering to display lesion candidates
ConclusionEven with the aid of computer-aided detection, radiologists overlook many aneurysms if the presentation method is not optimal. Overlaying colored lesion candidates on volume-rendered images can help them detect more aneurysms. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - February 27, 2021 Category: Radiology Source Type: research

Elective surgery outcomes in inflammatory bowel disease: interpretation at magnetic resonance enterography
AbstractInflammatory bowel diseases include pathologic intestinal conditions of unknown etiology, such as Crohn ’s disease and ulcerative colitis. Crohn’s disease consists in a chronic transmural inflammation that can affect any part of the gastrointestinal tract and whose clinical course is characterized by a fluctuation of remission and recurrences, while inflammation in ulcerative colitis involves the solely layer of colonic mucosa. Cross-sectional imaging, and especially magnetic resonance enterography, is able to provide useful information about small bowel lesions as well as intestinal and extra-intestina...
Source: Japanese Journal of Radiology - February 24, 2021 Category: Radiology Source Type: research

Carbon-ion radiotherapy for octogenarians with locally advanced non-small-cell lung cancer
ConclusionCIRT alone is safe and effective for octogenarians with LA-NSCLC. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - February 19, 2021 Category: Radiology Source Type: research

Comparison of three freeware software packages for 18 F-FDG PET texture feature calculation
AbstractPurposeTo compare texture feature estimates obtained from18F-FDG-PET images using three different software packages.MethodsPET images from 15 patients with head and neck cancer were processed with three different freeware software: CGITA, LIFEx, and Metavol. For each lesion, 38 texture features were extracted from each software package. To evaluate the statistical agreement among the features across packages a non-parametric Kruskal –Wallis test was used. Differences in the features between each couple of software were assessed using a subsequent Dunn test. Correlation between texture features was evaluated v...
Source: Japanese Journal of Radiology - February 17, 2021 Category: Radiology Source Type: research

Artificial intelligence: a critical review of current applications in pancreatic imaging
AbstractThe applications of artificial intelligence (AI), including machine learning and deep learning, in the field of pancreatic disease imaging are rapidly expanding. AI can be used for the detection of pancreatic ductal adenocarcinoma and other pancreatic tumors but also for pancreatic lesion characterization. In this review, the basic of radiomics, recent developments and current results of AI in the field of pancreatic tumors are presented. Limitations and future perspectives of AI are discussed. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - February 6, 2021 Category: Radiology Source Type: research

Convolutional neural network in nasopharyngeal carcinoma: how good is automatic delineation for primary tumor on a non-contrast-enhanced fat-suppressed T2-weighted MRI?
AbstractPurposeConvolutional neural networks (CNNs) show potential for delineating cancers on contrast-enhanced MRI (ce-MRI) but there are clinical scenarios in which administration of contrast is not desirable. We investigated performance of the CNN for delineating primary nasopharyngeal carcinoma (NPC) on non-contrast-enhanced images and compared the performance to that on ce-MRI.Materials and methodsWe retrospectively analyzed primary NPC in 195 patients using a well-established CNN, U-Net, for tumor delineation on the non-contrast-enhanced fat-suppressed (fs)-T2W, ce-T1W and ce-fs-T1W images. The CNN-derived delineatio...
Source: Japanese Journal of Radiology - February 5, 2021 Category: Radiology Source Type: research

Correction to: Predictive factors of truncation artifacts in the arterial phase of Gd-EOB-DTPA-enhanced MRI: a nationwide multicenter study
In the original publication of this paper, results section has been mistakenly published without consistency with Tables. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - February 4, 2021 Category: Radiology Source Type: research

MR imaging findings of unusual leiomyoma and malignant uterine myometrial tumors: what the radiologist should know
AbstractUterine sarcomas account for less than 1% of gynecological malignancies and 2 –5% of all uterine malignancies. Such sarcomas mainly include leiomyosarcoma (LMS) and endometrial stromal sarcoma (ESS). Additionally, inflammatory myofibroblastic tumor (IMT) and endometrial carcinoma arising in adenomyosis can occur as uterine myometrial tumors. Their differentiation from leiom yoma (LM), particularly degenerated LM and the malignant tumors, is challenging, but preoperative diagnosis is very important for the patient’s management. We demonstrate the useful and compulsory findings to differentiate between ut...
Source: Japanese Journal of Radiology - January 31, 2021 Category: Radiology Source Type: research

Series of myocardial FDG uptake requiring considerations of myocardial abnormalities in FDG-PET/CT
AbstractDistinct from cardiac PET performed with preparation to control physiological FDG uptake in the myocardium, standard FDG-PET/CT performed with 4 –6 h of fasting will show variation in myocardial FDG uptake. For this reason, important signs of myocardial and pericardial abnormality revealed by myocardial FDG uptake tend to be overlooked. However, recognition of possible underlying disease will support further patient management to avoid co mplications due to the disease. This review demonstrates the mechanism of FDG uptake in the myocardium, discusses the factors affecting uptake, and provides notable ima...
Source: Japanese Journal of Radiology - January 31, 2021 Category: Radiology Source Type: research

Magnetic resonance imaging findings in 11 cases of dedifferentiated endometrial carcinoma of the uterus
ConclusionMRI findings of DEC showed two patterns: mass-forming type and diffuse myometrial type with poor prognosis. Most patients with DEC had intratumoral hemorrhage, and large tumors (>  5 cm) had gross necrosis, which appeared as nonenhanced areas on contrast-enhanced MRI. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 30, 2021 Category: Radiology Source Type: research

Fat tissue as an embolic material changes the embolization time in a size-dependent manner: a basic investigation using rabbits
ConclusionsFat tissue serves as an embolic material that changes the embolization time in a size-dependent manner. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 29, 2021 Category: Radiology Source Type: research

Acknowledgment
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 28, 2021 Category: Radiology Source Type: research

Could both intrinsic and extrinsic iodine be successfully suppressed on virtual non-contrast CT images for detecting thyroid calcification?
AbstractPurposeAlthough virtual non-contrast (VNC) successfully removes iodinated contrast, uncertainty exists regarding the feasibility of VNC to suppress iodine for detecting thyroid calcification. Therefore, we evaluated whether both intrinsic and extrinsic iodine attenuation were suppressed on VNC images.Material and methodsWe enrolled 128 patients (male: female 17:111; age 48.0  ± 10.4 years) who underwent dual-layer dual-energy CT (DL-DECT) examination before their thyroid cancer surgeries. Two additional sets of VNC (VNCu, VNCc) images were retrospectively generated from their true unenhanc...
Source: Japanese Journal of Radiology - January 28, 2021 Category: Radiology Source Type: research

Pulmonary vascular enlargement and lesion extent on computed tomography are correlated with COVID-19 disease severity
ConclusionSubsegmental vascular enlargement is a notable finding to predict acute COVID-19 disease severity. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 27, 2021 Category: Radiology Source Type: research

Correction to: Toxicity and clinical outcomes of single ‑fraction high‑dose‑rate brachytherapy combined with external beam radiotherapy for high‑/very high‑risk prostate cancer: A dosimetric analysis of toxicity
In the original publication, Toshifumi Gabata should be listed the final author. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 26, 2021 Category: Radiology Source Type: research

Differences in patterns of recurrence of squamous cell carcinoma and adenocarcinoma after radiotherapy for stage III non-small cell lung cancer
AbstractPurposeTo evaluate the differences in patterns of recurrence and treatment results by histology after definitive radiotherapy for stage III non-small cell lung cancer (NSCLC) in Japan.Materials and methodsPatients with stage III NSCLC who underwent definitive radiotherapy between 2000 and 2016 in our institution were included. A total of 217 patients were enrolled. Propensity score matching was used to exclude the following confounding factors: (1) age ( ≥70 years or 
Source: Japanese Journal of Radiology - January 23, 2021 Category: Radiology Source Type: research

Texture analysis of delayed contrast-enhanced computed tomography to diagnose cardiac sarcoidosis
ConclusionTexture analysis of CTDE could differentiate CS from non-CS with high reproducibility. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 22, 2021 Category: Radiology Source Type: research

Direct aspiration thrombectomy experience with the SOFIA 6F catheter in acute ischemic stroke
ConclusionIn the majority of our cases, the SOFIA 6F catheter provided effective and rapid recanalization with aspiration thrombectomy. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 19, 2021 Category: Radiology Source Type: research

Evaluation of cervical ossification of the posterior longitudinal ligament with 3D broadband IR-prepared ultrashort echo-time imaging: a pilot study
Conclusion3D IRP UTE imaging may be useful for assessing OPLL. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 18, 2021 Category: Radiology Source Type: research

Spectrum of CT findings in amebic colitis
AbstractEntamoeba histolytica is distributed throughout the world. Invasive amebiasis affects millions of people globally, and the associated complications cause 40,000 –100,000 deaths per year. In countries where fecal–oral transmission is unusual, amebic colitis is not common, and the infection may be seen in travelers to and emigrants from endemic areas. Without adequate treatment, amebic colitis may develop into fulminant and become rapidly fatal. With the current increase in global mobility, amebic colitis should be suspected even in patients not in the endemic areas. CT plays an important role in the diag...
Source: Japanese Journal of Radiology - January 18, 2021 Category: Radiology Source Type: research

Correction to: Imaging findings of lesions in the middle and posterior mediastinum
In the original publication, the affiliations of authors were incorrectly published. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 18, 2021 Category: Radiology Source Type: research

Deep learning image reconstruction for improvement of image quality of abdominal computed tomography: comparison with hybrid iterative reconstruction
AbstractPurposeTo evaluate the usefulness of the deep learning image reconstruction (DLIR) to enhance the image quality of abdominal CT, compared to iterative reconstruction technique.MethodPre and post-contrast abdominal CT images in 50 patients were reconstructed with 2 different algorithms: hybrid iterative reconstruction (hybrid IR: ASiR-V 50%) and DLIR (TrueFidelity). Standard deviation of attenuation in normal liver parenchyma was measured as the image noise on pre and post-contrast CT. The contrast-to-noise ratio (CNR) for the aorta, and the signal-to-noise ratio (SNR) of the liver were calculated on post-contrast C...
Source: Japanese Journal of Radiology - January 15, 2021 Category: Radiology Source Type: research

Crohn disease: magnetic resonance enterocolonography features of endoscopic ulcer stages reclassified with the healing process and the relationships to prognoses
This study aimed to compare magnetic resonance enterocolonography (MREC) features among the endoscopic ulcer stages reclassified to include healing ulcers and to assess the prognoses in Crohn disease (CD).MethodsAltogether, 89 consecutive patients with CD who had undergone MREC and ileocolonoscopy or balloon-assisted enteroscopy were retrospectively studied. Patients were reclassified into 38 patients with no deep ulcer, seven with healing deep ulcer, and 44 with active deep ulcer stage. MREC score derived from a 5-point MR classification and MR index of activity (MaRIA) were evaluated, and patients were followed-up. The p...
Source: Japanese Journal of Radiology - January 13, 2021 Category: Radiology Source Type: research

There are no three physiological narrowings in the upper urinary tract: a new concept of the retroperitoneal anatomy around the ureter
AbstractThe widely held dogma of three physiological narrowings in the upper urinary tract has proven incorrect by recent several studies using computed tomography images. There are only two common obstruction sites: the upper ureter and the ureterovesical junction. The second narrowing, where the ureter crosses the iliac vessels, cannot be regarded anymore as a common obstruction site. The mechanism by which stones lodge in the upper ureter is explained anatomically by the change in ureteral mobility and compliance at the level where the ureter exits the perirenal space. This level can be identified radiologically as the ...
Source: Japanese Journal of Radiology - January 9, 2021 Category: Radiology Source Type: research

Reviewing applications of structural and functional MRI for bipolar disorder
This study aims to review recently published literature regarding the use of fMRI to investigate structural –functional relationships in BD diagnosis and specifically resting-state fMRI to provide an opinion on fMRI’s modern clinical application. All sources in this literature review were collected through searches on both PubMed and Google Scholar databases for terms such as ‘resting-state fMRI’ and ‘functional neuroimaging biomarkers of bipolar disorder’. While there are promising results supporting the use of fMRI for improving differential accuracy and establishing clinically relevan...
Source: Japanese Journal of Radiology - January 2, 2021 Category: Radiology Source Type: research

Diffusion analysis of fluid dynamics with incremental strength of motion proving gradient (DANDYISM) to evaluate cerebrospinal fluid dynamics
ConclusionThe results indicated prominent CSF motions in the ventral portion of the posterior fossa, suprasellar cistern, and Sylvian fissure but smaller motions in the lateral ventricles and parietal subarachnoid space. This method may provide information of CSF dynamics in the clinical settings within short imaging time. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 2, 2021 Category: Radiology Source Type: research

Whole-liver transcatheter arterial chemoinfusion and bland embolization with fine-powder cisplatin and trisacryl gelatin microspheres for treating unresectable multiple hepatocellular carcinoma
ConclusionWhole-liver TABCE with fine-powder cisplatin and trisacryl gelatin microspheres was well tolerated and effective in patients with multinodular HCC. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 2, 2021 Category: Radiology Source Type: research

A practical system that enables physicians to respond expeditiously to significant unexpected findings (SUFs) in radiological reports
AbstractPurposeTo demonstrate effectiveness of our present radiological report check flowchart enabling physicians to respond to significant unexpected findings (SUFs), by comparing the response periods from the examination date to the action date on untreated SUFs between the previous and present versions of our flowchart.MethodsIn the flowchart ’s previous version used February–October 2019, SUFs, which were notified by email, were audited every month. The physician received a phone call and was asked to act on the untreated SUF. In the flowchart’s present version used from November 2019 to May 2020, SU...
Source: Japanese Journal of Radiology - January 1, 2021 Category: Radiology Source Type: research

Age-related changes in the distribution of intravenously administered gadolinium-based contrast agents leaked into the cerebrospinal fluid in patients with suspected endolymphatic hydrops
ConclusionAn age-related leakage of the intravenously administered GBCAs was found in the whole-brain CSF. The age-related change in the distribution of the GBCA leakage was more prominent in the ventricular CSF than in the extra-ventricular CSF. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - January 1, 2021 Category: Radiology Source Type: research

Split-bolus injection protocol with optimized timings of contrast medium injection and CT scanning for 3D CT angio-venography before laparoscopic gastrectomy
ConclusionThe split-bolus protocol with optimized timing was more effective for providing improved image quality with reduced radiation dose compared with the single-bolus protocol in 3D CT angio-venography for laparoscopic gastrectomy. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 22, 2020 Category: Radiology Source Type: research

Carcinosarcoma of the ovary: MR and clinical findings compared with high-grade serous carcinoma
ConclusionCSs formed larger masses, and the stained-glass appearance, hemorrhage, and necrosis were more frequently observed in CSs. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 20, 2020 Category: Radiology Source Type: research

Usefulness of dual-layer spectral CT in follow-up examinations: diagnosing recurrent squamous cell carcinomas in the head and neck
AbstractPurposeTo evaluate the usefulness of dual-energy analyses using dual-layer spectral CT (DLSCT) for diagnosing recurrent lesions of head and neck squamous cell carcinoma (HNSCC).Materials and methodsThe study population comprised 62 patients with a history of HNSCC. Attenuation values on conventional 120-kVp images and 40-keV virtual monochromatic images (VMIs) and iodine concentration (IC) were compared between recurrent lesions and post-treatment changes or non-recurrent nodes using the Mann –WhitneyU test. Receiver-operating characteristic (ROC) analysis was used to assess the ability of attenuation values ...
Source: Japanese Journal of Radiology - November 19, 2020 Category: Radiology Source Type: research

Developing diagnostic reference levels in Japan
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 19, 2020 Category: Radiology Source Type: research

Visualizing “featureless” regions on mammograms classified as invasive ductal carcinomas by a deep learning algorithm: the promise of AI support in radiology
ConclusionWe successfully showed that features isolated by a DL-based algorithm trained to classify IDCs were indeed those known to be associated with each pathology. Thus, using AI can expand the capacity of radiologists through the discovery of previously unknown findings. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 16, 2020 Category: Radiology Source Type: research

Structured reporting of CT or MRI for perihilar cholangiocarcinoma: usefulness for clinical planning and interdisciplinary communication
AbstractPurposeTo compare the content and communication between the radiologist and the clinicians for treatment planning of structured reports (SRs) and narrative reports (NRs) for reporting CT/MRI findings in patients with perihilar cholangiocarcinoma.Materials and methodThis retrospective study included 54 patients with perihilar cholangiocarcinoma who underwent CT/MRI before ERCP or surgery. For all patients, we generated both NRs and SRs for perihilar cholangiocarcinoma and compared the number of key features between NRs and SRs. In addition, three clinicians performed a questionnaire evaluation that included three qu...
Source: Japanese Journal of Radiology - November 11, 2020 Category: Radiology Source Type: research

Pediatric living donor left lateral segment liver transplantation for biliary atresia: Doppler ultrasound findings in early postoperative period
ConclusionThe hepatic hemodynamic of post-transplanted children detected by DU had specific changing trends and normal ranges, which provides valuable reference values for ultrasonologists and pediatric transplant clinicians. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 8, 2020 Category: Radiology Source Type: research

Dual-energy CT enterography in evaluation of Crohn ’s disease: the role of virtual monochromatic images
ConclusionVMI are helpful for the differentiation of affected bowel walls in CD patients, providing high diagnostic accuracy. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 7, 2020 Category: Radiology Source Type: research

Combination therapy by transarterial injection of miriplatin-iodized oil suspension with radiofrequency ablation (RFA) versus microwave ablation (MWA) for small hepatocellular carcinoma: a comparison of therapeutic efficacy
ConclusionMPT-MWA may have improved therapeutic efficiency in the treatment of small HCCs. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 4, 2020 Category: Radiology Source Type: research

Evaluation of a Monte Carlo-based algorithm for the influence of totally implantable venous access ports in external radiation therapy
ConclusionTIVAPs caused target dose reductions and dose increase near the TIVAP, especially when made of titanium. The influences are reflected in the MC-based algorithm. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - November 2, 2020 Category: Radiology Source Type: research

Preoperative computerized tomography screening for COVID-19 pneumonia in asymptomatic patients: experiences from two centers
ConclusionChest CT screening for COVID-19 has a very low yield in asymptomatic preoperative patients and shows false-positive findings in 9.2% of cases, potentially leading to unnecessary postponing of the surgery. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 31, 2020 Category: Radiology Source Type: research

Simplification of balloon-occluded retrograde transcatheter obliteration procedure using a coaxial double balloon catheter compared with a single-balloon catheter
ConclusionThe use of a coaxial double balloon catheter can simplify the BRTO procedure compared with a single-balloon catheter. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 31, 2020 Category: Radiology Source Type: research

Application of full-field organ dose modulation on cervical- thoraco-abdominopelvic contrast-enhanced computed tomography
AbstractBackground and objectiveTo study the radiation dose and image quality on the use of full-field organ dose modulation (ODM) on cervical-thoracic-abdominal-pelvic contrast-enhanced computed tomography (CT) scanning on female chemotherapy patients.MethodsEighty female chemotherapy patients undergoing cervical-thoracic-abdominal-pelvic contrast-enhanced CT were prospectively enrolled and randomly divided into two groups: group A and group B, each with 40 patients. Full-field ODM technique was used on group A and regular scanning patterns were used on group B. We calculated and recorded the signal-to-noise ratio (SNR), ...
Source: Japanese Journal of Radiology - October 28, 2020 Category: Radiology Source Type: research

Potential of dosage reduction of cone-beam CT dacryocystography in healthy volunteers by decreasing tube current
ConclusionBy decreasing the tube current, CBCT-DCG can be performed with a significant reduction of effective dose without loss of image quality in healthy volunteers. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 27, 2020 Category: Radiology Source Type: research

Large vessel vasculitis: imaging standards of 18 F-FDG PET/CT
AbstractImprovements in positron emission tomography (PET) technology have contributed to increased diagnostic accuracy in patients with large-vessel vasculitis (LVV) over the last decades. Many systematic reviews and meta-analyses were conducted, and earlier diagnosis by18F-FDG PET can be made in patients suspected of having LVV. Two subtypes, Takayasu arteritis and giant cell arteritis, will progress when poorly responding to corticosteroids and augmented immunosuppression. In most patients, disease activity cannot be monitored by laboratory tests alone; therefore, glucose metabolism may be a source for possible biomarke...
Source: Japanese Journal of Radiology - October 27, 2020 Category: Radiology Source Type: research

CT and MRI of pancreatic tumors: an update in the era of radiomics
AbstractRadiomics is a relatively new approach for image analysis. As a part of radiomics, texture analysis, which consists in extracting a great amount of quantitative data from original images, can be used to identify specific features that can help determining the actual nature of a pancreatic lesion and providing other information such as resectability, tumor grade, tumor response to neoadjuvant therapy or survival after surgery. In this review, the basic of radiomics, recent developments and the results of texture analysis using computed tomography and magnetic resonance imaging in the field of pancreatic tumors are p...
Source: Japanese Journal of Radiology - October 21, 2020 Category: Radiology Source Type: research

Investigation of site and frequency of asymptomatic injury in medial structures of the elbow in adolescent baseball players using dedicated magnetic resonance imaging
This study aimed to retrospectively determine the actual injury site and rate, and investigate the underlying reason for discrepancies anatomically and biomechanically.Materials and methodsForty-four male adolescent baseball players were scanned using MRI. Two interpreters independently and retrospectively assessed the ME, UCL-p, and UCL-d injuries using the gradient echo axial, sagittal, and coronal planes.ResultsThe injury prevalence was significantly higher in the ME and UCL-p (>  50% of the participants) than in the UCL-d (22.7%),P 
Source: Japanese Journal of Radiology - October 20, 2020 Category: Radiology Source Type: research

The Greulich-Pyle and Gilsanz-Ratib atlas method versus automated estimation tool for bone age: a multi-observer agreement study
ConclusionAutomated bone age estimation showed comparable results with GP and GR methods and its utilization may decrease inter-observer variability. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 16, 2020 Category: Radiology Source Type: research

Late clinical outcomes of manual aspiration thrombectomy for a massive acute pulmonary thromboembolism
ConclusionPatients who undergo manual aspiration thrombectomy for acute massive pulmonary thromboembolism show acceptable outcomes. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 12, 2020 Category: Radiology Source Type: research

Deep learning-based and hybrid-type iterative reconstructions for CT: comparison of capability for quantitative and qualitative image quality improvements and small vessel evaluation at dynamic CE-abdominal CT with ultra-high and standard resolutions
AbstractPurposeTo determine the image quality improvement including vascular structures using deep learning reconstruction (DLR) for ultra-high-resolution CT (UHR-CT) and area-detector CT (ADCT) compared to a commercially available hybrid-iterative reconstruction (IR) method.Materials and methodThirty-two patients suspected of renal cell carcinoma underwent dynamic contrast-enhanced (CE) CT using UHR-CT or ADCT systems. CT value and contrast-to-noise ratio (CNR) on each CT dataset were assessed with region of interest (ROI) measurements. For qualitative assessment of improvement for vascular structure visualization, each a...
Source: Japanese Journal of Radiology - October 10, 2020 Category: Radiology Source Type: research