A case of autoimmune pulmonary alveolar proteinosis appearing as a localized ground-glass opacity
Abstract Pulmonary alveolar proteinosis (PAP) is a rare diffuse lung disease caused by abnormal intra-alveolar surfactant accumulation; it commonly appears as a “crazy-paving” pattern on high-resolution computed tomography. Here, we report a rare case of autoimmune PAP appearing as localized ground-glass opacity. An 82-year-old woman underwent chest computed tomography (CT) at another facility for cough, and a 2-cm localized ground-glass opacity was detected at the bottom of the right upper lung lobe. When she presented for follow-up at our hospital 6 months later, she was asymptomatic. The CT ex...
Source: Japanese Journal of Radiology - November 1, 2014 Category: Radiology Source Type: research

Clinical utility of the normalized apparent diffusion coefficient for preoperative evaluation of the aggressiveness of prostate cancer
Conclusions nADC is superior to ADC for estimating the aggressiveness of prostate cancer. It is a noninvasive technique that aids in the selection of appropriate treatments. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 17, 2014 Category: Radiology Source Type: research

Hepatoid adenocarcinoma of the stomach: dual-time-point 18 F-FDG PET/CT findings
Abstract Hepatoid adenocarcinoma of the stomach (HAS) is a rare distinct variant of gastric carcinoma with earlier metastases and worse prognosis compared to the more common intestinal types. It is often misdiagnosed as hepatocellular carcinoma, especially when primary HAS is insignificantly anatomically abnormal, produces high alpha-fetoprotein and develops early liver metastasis. In this case we show the significance of dual-time-point 18F-fluorodeoxyglucose positron emission tomography (PET)/computed tomography (CT) in accurately diagnosing and staging HAS. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 7, 2014 Category: Radiology Source Type: research

Reproducibility of coronary artery calcium measurements using 0.8-mm-thickness 256-slice coronary CT
Conclusion Reproducibility in CAC measurements using the 0.8-mm-thickness 256-slice MDCT showed low inter-scan/inter-observer variability. Therefore, this CT imaging has potential to be used in prospective, longitudinal CAC assessments. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 3, 2014 Category: Radiology Source Type: research

Imaging findings of an extradigital fibro-osseous pseudotumor
In this report we describe the clinical and radiological features of a case of an FOPT that involved the hypothenar region of the hand. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

Coronary cameral fistula treated by the Amplatzer vascular plug
We report a case of coronary cameral fistula of the left anterior descending artery to the right ventricle, which was closed by an Amplatzer vascular plug. Coronary CT angiography was used to evaluate the patient prior to the procedure to locate the placement site for the vascular plug. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

Utility of an initial adaptive bladder volume control with ultrasonography for proton-beam irradiation for prostate cancer
Abstract Purpose Our purpose was to evaluate the utility of time-fixed bladder volume control and adaptive bladder volume control with ultrasonography (US). Materials and methods Seventy-five patients with prostate cancer treated with proton-beam therapy were enrolled. Treatment plans were created using computed tomography (CT) images obtained 60 min after urination with usual water intake. Just before each irradiation, bladder volume was measured with US at the directed urine collection time. Bladder volume was calculated according to orthog...
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

Fusion imaging using subtracted and unsubtracted rotational angiography for pretherapeutic evaluation of dural arteriovenous fistulas
We describe the clinical utility of an imaging technique that combines 3D subtracted and unsubtracted rotational angiography for evaluation of the angioarchitecture of dural arteriovenous fistulas (DAVFs). Methods From May 2010 to June 2013, 21 consecutive patients with intracranial DAVFs (22 lesions) underwent 3D angiography for pretherapeutic evaluation. 3D fusion angiography (3DFA) images were semiautomatically obtained from a dataset of unsubtracted and subtracted rotational angiographs. Multiplanar reformatted images and partial MIP images from unsubtracted rotational angiog...
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

Early defects identified by computed tomography angiography are associated with left ventricular dysfunction and exercise intolerance following acute myocardial infarction
Abstract Purpose We evaluated the influence of early defects (EDs) in the infarcted myocardium after reperfusion, detected by computed tomography angiography (CTA), on cardiac function and exercise capacity in the chronic phase. Materials and methods We retrospectively analyzed 48 acute myocardial infarction (AMI) patients who underwent both CTA using 64-slice multidetector CT within 14 ± 6 days and cardiopulmonary exercise testing within 3 months after AMI onset between 2005 and 2007. The patients were divided into 2 groups: the EDs
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

Imaging spectrum of peritoneal carcinomatosis on FDG PET/CT
Abstract Recognition of patterns has always been extremely important in cross-sectional imaging. Peritoneal involvement, both primary and as dissemination from abdominopelvic malignancies, is manifested in different forms, purely because of anatomical complexity. We studied series of peritoneal involvement by 18F-fluorodeoxyglucose positron-emission tomography/computed tomography fusion imaging and derived patterns of tracer uptake on maximum intensity projection and cross-sectional fusion images. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - October 1, 2014 Category: Radiology Source Type: research

The year for our new endeavor: 2015
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 30, 2014 Category: Radiology Source Type: research

Intermittent transcatheter therapy through a new indwelling catheter system for patients with hepatocellular carcinoma
Conclusion System-i provides an effective and safe method for selective catheterization of feeding arteries for administration of transcatheter arterial chemoembolization or infusion in patients with HCC. Treatment regimens can be individualized without limiting the number of treatments or treatment locations, and patients can be treated on an outpatient basis. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 27, 2014 Category: Radiology Source Type: research

In reply to: Minimizing the radiation dose in coronary CT angiography using prospective ECG-triggering, low tube voltage and iterative reconstruction technologies
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 25, 2014 Category: Radiology Source Type: research

Visualization of the right adrenal vein using CT during right inferior phrenic arteriography in hepatocellular carcinoma patients
Conclusion Almost all right adrenal veins were visualized using CTRIPA; the detection rate was significantly higher on CTRIPA than on MDCT before TACE. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 24, 2014 Category: Radiology Source Type: research

A study on the usefulness of methylcellulose in rectal CT based on the analysis of the differences in absorption of radiation-permeable and radiation-impermeable materials
Conclusions Out of these materials, methylcellulose had the advantage of reducing discomfort in patients, and was more convenient for examiners before and after the rectal CT scan. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 23, 2014 Category: Radiology Source Type: research

A novel image toggle tool for comparison of serial mammograms: automatic density normalization and alignment—development of the tool and initial experience
Conclusions We developed a new tool to facilitate comparative reading of DMGs on a mammography viewing system. Using this tool for toggling comparisons might improve the interpretation efficiency of serial DMGs. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 20, 2014 Category: Radiology Source Type: research

Diagnostic accuracy of the clinical and CT findings for differentiating Kikuchi’s disease and tuberculous lymphadenitis presenting with cervical lymphadenopathy
Conclusion CT can be a helpful tool for differentiating KD from TB, especially when it is combined with the clinical findings. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 18, 2014 Category: Radiology Source Type: research

A case of right renal artery originating from the thoracic aorta
Abstract The renal arteries normally originate from the abdominal aorta between the first and second lumbar vertebrae. The main renal artery arising from the thoracic aorta is an uncommon anomaly. Here we report a rare case of a right renal artery originating above the celiac axis. A 38-year-old male underwent computed tomographic angiography in preparation for being a renal donor, and two right renal arteries were observed. A main renal artery arose from the thoracic aorta at the 11th thoracic vertebral level, and an accessory renal artery originated from the abdominal aorta at the renal hilum. (Source: Japanese ...
Source: Japanese Journal of Radiology - September 14, 2014 Category: Radiology Source Type: research

Prognosis of patients with intermediate-stage hepatocellular carcinomas based on the Child-Pugh score: subclassifying the intermediate stage (Barcelona Clinic Liver Cancer stage B)
Abstract Purpose Retrospective evaluation of intermediate-stage hepatocellular carcinoma (HCC) patient survival after undergoing chemoembolization based on the Child-Pugh score. Materials and methods Data of intermediate-stage HCC patients undergoing chemoembolization were gathered from 43 centers in Japan. Overall survival rates were compared with Child-Pugh scores. Results Of the 329 patients examined in this study, Child-Pugh scores were 5 (CP-5) in 136 patients (41.3 %), 6 (CP-6) in 101 patients (30.7 ...
Source: Japanese Journal of Radiology - September 12, 2014 Category: Radiology Source Type: research

Abdominal nonparenchymatous cystic lesions and their mimics in children
Abstract Abdominal cystic lesions in children may originate from parenchymatous organs or from nonparencyhmatous structures. Although these lesions have well-described imaging features, proper diagnosis usually depends on the accurate determination of the origin of the lesion. Because large lesions may resemble each other it is difficult to identify the site of origin, which results in a diagnostic dilemma. In this pictorial essay we describe abdominal nonparenchymatous cystic lesions and their mimics arising from parenchymatous organs in children. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 9, 2014 Category: Radiology Source Type: research

Diagnostic performances of shear-wave elastography for identification of malignant breast lesions: a meta-analysis
Conclusion SWE has a high sensitivity and specificity in the differentiation of benign and malignant breast lesions. More large and prospective studies are warranted to further examine the performance of SWE. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 7, 2014 Category: Radiology Source Type: research

A successful case of pushing, catching, and fixing a migrated microcoil using a detachable coil
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Additional MR contrast dosage for radiologists’ diagnostic performance in detecting brain metastases: a systematic observer study at 3 T
Abstract Purpose To evaluate the diagnostic performance of a double-dose administration of gadolinium for brain metastases at 3 T in a systematic observer test. Materials and Methods Postcontrast MR images of 39 patients (total 104 metastases) were obtained by 3D T1-weighted sequences with both standard and cumulative double dose contrast administration. An observer test involving 9 radiologists (5 board-certified radiologists and 4 residents) was performed, and their diagnostic performance with the two doses was compared by means of sensitivity, ...
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Efficacy of preoperative transcatheter arterial chemoembolization combined with systemic chemotherapy for treatment of unresectable hepatoblastoma in children
Conclusion Preoperative TACE combined with systemic chemotherapy was effective in inducing surgical resectability of unresectable hepatoblastoma. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Feasibility study of a breast density measurement within a direct photon-counting mammography scanner system
Conclusion The calculated volumetric glandularity using this new application should correspond well with the true volumetric density of each breast. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Unilateral renal oncocytosis and combined hybrid tumor: a case report and review of the literature
Abstract Renal oncocytosis is a very rare cause of multiple renal masses. Imaging features of renal oncocytosis and combined tumors have rarely been reported. Here, we describe a case of unilateral left renal oncocytosis and a combined hybrid tumor between chromophobe renal cell carcinoma and oncocytoma, which were depicted on CT and MR imaging as multiple enhancing solid masses with one dominant mass. Additionally, we reviewed the literature. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

The efficiency of apparent diffusion coefficient quantification in diagnosis of acute cholecystitis and in differentiation of cholecystitis from extrinsic benign gallbladder wall thickening
Abstract Purpose The aim of the current study was to assess the efficiency of the apparent diffusion coefficient (ADC) measurement in diagnosis of acute cholecystitis and in differentiation of cholecystitis from extrinsic benign gallbladder wall thickening. Methods Forty patients who were diagnosed to have acute cholecystitis by ultrasonographic examination were included in this study. The control group consisted of 18 patients without symptoms of gallstones and cholecystitis whose gallbladder walls were thickened due to cirrhotic ascites. Both gr...
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

The MRI findings in a case of ovarian mucinous borderline tumor mimicking a serous surface borderline tumor
Abstract Exophytic papillary growth from the surface epithelium is one of the features suggesting serous surface borderline tumors of the ovary in which magnetic resonance imaging (MRI) typically shows a hyperintense papillary mass with a hypointense internal branching structure on T2-weighted images. We herein report a case of an endocervical-like mucinous borderline tumor of the ovary, which showed an exophytic papillary growth pattern on MRI as well as pathology. Such a growth pattern is known to be characteristic of serous borderline tumors, but it should be noted that it could also be a finding in mucinous b...
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Vascular neurocutaneous disorders: neurospinal and craniofacial imaging findings
Abstract We review the neurospinal and craniofacial imaging findings in vascular neurocutaneous disorders. The patients presented with cutaneous and cerebral lesions associated with craniofacial abnormalities or spinal lesions. Vascular neurocutaneous disorders may involve segmental or localized lesions associated with either low- or high-flow vascular malformations. Other neuroimaging findings include vascular occlusive changes with ischemic stroke, ectatic arteries, aneurysm, cortical migrational disorders such as hemimegalencephaly and congenital anomalies of the posterior fossa. Craniofacial vascular malforma...
Source: Japanese Journal of Radiology - September 1, 2014 Category: Radiology Source Type: research

Traumatic hypovolemic shock revisited: the spectrum of contrast-enhanced abdominal computed tomography findings and clinical implications for its management
Abstract Hypovolemic shock is often seen in patients with severe blunt trauma who have suffered from blood circulation inadequate to maintain oxygen delivery to multiple organs. The early recognition and prompt management of hypovolemic shock in patients with multiple injuries are mandatory to improving prognosis and patient conditions. The diagnostic accuracy of computed tomography (CT) as a primary diagnostic tool is well established. The abdominal organs show several common and classic appearances on contrast-enhanced CT in patients with trauma. The hypovolemic shock complex is reported in the previous literatu...
Source: Japanese Journal of Radiology - August 31, 2014 Category: Radiology Source Type: research

An unusual case of disseminated toxoplasmosis in a previously healthy pregnant patient: radiographic, CT, and MRI findings
We present a case of disseminated toxoplasmosis involving pulmonary, central nervous system, and lymph nodes in a pregnant woman and imaging findings on radiography, computed tomography, and magnetic resonance imaging. (Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - August 24, 2014 Category: Radiology Source Type: research

Minimizing the radiation dose in coronary CT angiography using prospective ECG-triggering, low tube voltage and iterative reconstruction technologies
(Source: Japanese Journal of Radiology)
Source: Japanese Journal of Radiology - August 23, 2014 Category: Radiology Source Type: research