The usefulness of b value threshold map in the evaluation of rectal adenocarcinoma
AbstractPurposeTo investigate the usefulness ofb value threshold (bThreshold) map in the evaluation of rectal adenocarcinoma by comparing it with diffusion-weighted images and ADC maps regarding lesion detection and the prediction of pathological features.Materials and MethodsThirty-five patients with rectal tumors were enrolled and underwent axial DWI using a 3-Tesla MRI system. Contrast-to-noise ratio (CNR) between the lesions and normal tissues were assessed on the diffusion-weighted images andbThreshold maps. Reproducibility for ADC andbThreshold values were assessed. Significant differences between different groups fo...
Source: Abdominal Imaging - October 23, 2019 Category: Radiology Source Type: research

Role of 18F-FDG PET/CT in restaging and follow-up of patients with GIST
Conclusions18F-FDG PET/CT seems to be an accurate method for detection and localization of local and distant recurrence in GIST with good sensitivity and specificity and significant impact on clinical decision-making. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 23, 2019 Category: Radiology Source Type: research

Can [ 18 F]F-FDG PET/CT be used to assess the pre-operative extent of peritoneal carcinomatosis in patients with colorectal cancer?
ConclusionPET/CT underestimates the extent of PC during surgery in both mucinous and non-mucinous CRC and is not recommended for intraperitoneal tumor scoring. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 23, 2019 Category: Radiology Source Type: research

Nodal drainage pathways in primary rectal cancer: anatomy of regional and distant nodal spread
AbstractNodal involvement is a significant prognostic factor in rectal cancer and difficult to assess preoperatively. An understanding of the patterns of nodal spread from different regions of the rectum can assist in this process and is essential for the purposes of surgical planning. In this article we define patterns of spread to mesenteric and pelvic sidewall nodal subgroups and discuss the importance of accurate anatomic localization of nodes for the purposes of staging and surgical planning. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 18, 2019 Category: Radiology Source Type: research

Report from the pancreatic ductal adenocarcinoma disease focused panel
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 17, 2019 Category: Radiology Source Type: research

Reverse rim sign on CEUS
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 16, 2019 Category: Radiology Source Type: research

Pancreatic transplantation with duodenoduodenostomy drainage: technique, normal radiological appearance and complications
AbstractPancreas transplantation is considered the curative treatment for severe type 1 diabetes mellitus in selected cases. Since the first procedure in 1966, surgical techniques have been improved. The current trend among most medical centers, as well as at our Institution, is enteric drainage and systemic venous or portal anastomosis. The aim of this pictorial essay is to describe the main imaging features of pancreatic transplantation with duodenoduodenostomy drainage. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 15, 2019 Category: Radiology Source Type: research

SAR DFP on pelvic floor dysfunction: annual report
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 14, 2019 Category: Radiology Source Type: research

Combined gadoxetic acid and gadobenate dimeglumine enhanced liver MRI: a parameter optimization study
ConclusionCombined GA  + GD enhanced T1-weighted MRI is feasible to achieve a homogeneously “plain-white-liver”. Future studies need to confirm that this protocol can improve sensitivity of liver lesion detection in patients with metastatic liver disease. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 12, 2019 Category: Radiology Source Type: research

Guidelines for MR imaging in rectal cancer: Europe versus United States
AbstractThe aim of this study was to compare and contrast recently published guidelines for staging and reporting of MR imaging in rectal cancer from the European Society of Gastrointestinal and Abdominal Radiology and the North American Society of Abdominal Radiology. These guidelines were assessed on the presence of consensus and disagreement. Items were compared by two reviewers, and items with agreement and disagreement between the guidelines were identified and are presented in the current paper. Differences between guidelines are discussed to offer insights in practice variations between both continents and among exp...
Source: Abdominal Imaging - October 11, 2019 Category: Radiology Source Type: research

DFP endometriosis roster
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 11, 2019 Category: Radiology Source Type: research

Bowel obstruction and intestinal ischemia: warnings for radiologists
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 11, 2019 Category: Radiology Source Type: research

The “bunch of grapes” pattern of branch-duct IPMN
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 11, 2019 Category: Radiology Source Type: research

Breath-hold compressed-sensing 3D MR cholangiopancreatography compared to free-breathing 3D MR cholangiopancreatography: prospective study of image quality and diagnostic performance in pancreatic disorders
AbstractPurposeTo compare image quality and diagnostic performance of three magnetic resonance cholangiopancreatography (MRCP) protocols in patients with suspected pancreatic abnormalities: free-breathing standard 3D-MRCP (STD), free-breathing compressed sensing 3D-MRCP (CS), and CS 3D-MRCP with acquisition during a single breath-hold  >  20 s (BH-CS).MethodsInformed consent was obtained. We performed 57 MRCPs in 56 prospectively included patients (29 men, median age 59  years). The three protocols were performed in random order. Acquisition time was recorded. Two radiologists blinded to the prot...
Source: Abdominal Imaging - October 9, 2019 Category: Radiology Source Type: research

SAR GI Bleeding DFP Annual Report
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 9, 2019 Category: Radiology Source Type: research

A comparative study of monoexponential versus biexponential models of diffusion-weighted imaging in differentiating histologic grades of hepatitis B virus-related hepatocellular carcinoma
AbstractPurposeTo compare the diagnostic value of apparent diffusion coefficient (ADC) and intravoxel incoherent motion metrics in discriminating histologic grades of hepatocellular carcinoma (HCC) in patients with hepatitis B virus (HBV) infection.Methods117 chronic HBV patients with 120 pathologically confirmed HCCs after surgical resection or liver transplantation were enrolled in this retrospective study. Diffusion-weighted imaging was performed using elevenb values (0 –1500 s/mm2) and twob values (0, 800  s/mm2) successively on a 3.0 T system. ADC0, 800, ADCtotal, diffusion coefficient (D), pseudodiffu...
Source: Abdominal Imaging - October 8, 2019 Category: Radiology Source Type: research

The “silver dollar” or “coin-on-end” vertebra sign
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 5, 2019 Category: Radiology Source Type: research

Clinical effectiveness and safety of self-expanding metal stent placement following palliative chemotherapy in patients with advanced esophageal cancer
AbstractPurposeTo investigate the effect of prior chemotherapy on self-expanding metal stent (SEMS)-related complications in patients with locally advanced primary esophageal cancer.Materials and methodsData from patients with locally advanced primary esophageal cancer who received SEMS placement with or without prior chemotherapy were retrospectively reviewed. Patients were grouped according to prior palliative therapy: group A (n = 41) had received SEMS only, and group B (n = 64) had received palliative chemotherapy prior to SEMS placement. Patients’ age, stricture length, tumor location...
Source: Abdominal Imaging - October 5, 2019 Category: Radiology Source Type: research

Radiation doses and image quality of abdominal CT scans at different patient sizes using spectral detector CT scanner: a phantom and clinical study
ConclusionRadiation dose for abdominal CT performed on SDCT is similar to the dose on a conventional CT for average size patients, lower for smaller patients, and slightly higher for larger patients. Image quality is similar between the two scanners. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 5, 2019 Category: Radiology Source Type: research

Society of abdominal radiology disease-focused panel (DFP) on rectal and anal cancer: annual short report
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 5, 2019 Category: Radiology Source Type: research

Annual short report of the society of abdominal radiology prostate cancer disease-focused panel
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 5, 2019 Category: Radiology Source Type: research

Lymph node metastasis in rectal cancer: comparison of MDCT and MR imaging for diagnostic accuracy
AbstractPurposeTo compare the diagnostic accuracies of MDCT and high-resolution MRI (HR-MRI) for regional nodal metastases with different short-axis diameter ranges in rectal cancer patients.MethodsRectal adenocarcinoma patients who underwent both MDCT and HR-MRI before surgery were included. The maximum short-axis diameters of the nodes were measured, and were classified as benign or malignant on imaging findings. All of the nodes were subdivided as follows:  ≤ 5 mm (Group A), >  5 mm and ≤ 10 mm (Group B) , and >  10 mm (Group C). The...
Source: Abdominal Imaging - October 4, 2019 Category: Radiology Source Type: research

Retroperitoneal cystic masses: magnetic resonance imaging features
The objective of this review is to discuss the clinical and histopathologic features, MRI characteristics, and management options of retroperitoneal cystic masses. Radiologists should be familiar with the MR imaging characteristics of retroperitoneal cystic masses to allow for a refined differential diagnosis, assist with lesion management, and prevent unnecessary invasive procedures. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 3, 2019 Category: Radiology Source Type: research

Clinical abdominal dual-energy CT: 15  years later
AbstractDual-energy CT (DECT) has been available for clinical use in the United States for close to 15  years. Although multiple applications in all areas of the body have been described that are only possible with DECT, the adoption into clinical practice has been slow. This paper will attempt to address many of the impediments the author has encountered from his discussions with radiologists acros s the country. A hopeful outcome would result in more practices adopting more DECT into their CT practices. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 3, 2019 Category: Radiology Source Type: research

Turquoise sign: pyogenic liver abscess
(Source: Abdominal Imaging)
Source: Abdominal Imaging - October 1, 2019 Category: Radiology Source Type: research

Potential image-based criteria of neoadjuvant chemotherapy for colon cancer: multireaders ’ diagnostic performance
ConclusionsT3/T4 was the best criterion in terms of diagnostic accuracy. However, in terms of interreader agreement and overtreatment risk, T3/T4 with ≥ 4 cm and T3cd/T4 were better as potential image-based criteria of neoadjuvant chemotherapy for colon cancer. (Source: Abdominal Imaging)
Source: Abdominal Imaging - October 1, 2019 Category: Radiology Source Type: research

Correlation between SACE (Subjective Angiographic Chemoembolization Endpoint) score and tumor response and its impact on survival after DEB-TACE in patients with hepatocellular carcinoma
AbstractPurposeTo asses angiographic and computed tomographic success criteria during and after transcatheter arterial drug-eluting bead chemoembolization (DEB-TACE) in patients with hepatocellular carcinoma (HCC) and its impact on progression-free survival (PFS) and overall survival (OS).MethodsIn this retrospective single-center study, 50 patients with unresectable HCC having undergone DEB-TACE from January 2010 to July 2015 were assessed. The angiographic endpoint was classified by Subjective Angiographic Chemoembolization Endpoint (SACE) scale. Relative tumor density in arterial (DArt) and portal venous phase (DPV) com...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Iatrogenic celiac and hepatic artery dissections during intra-arterial regional tumor therapies: a 16-year retrospective review
AbstractPurposeTo identify the incidence and outcomes of iatrogenic celiac and hepatic artery dissections during transarterial therapies, including bland embolization, chemoembolization, radioembolization (TARE), and pre-TARE scintigraphic mapping.MethodsThe institution ’s quality assessment database, electronic medical record, and picture archiving and communication system were reviewed to identify all patients who underwent transarterial locoregional therapy from 1/2001 to 7/2017 and to determine the incidence of iatrogenic dissection, to assess patency of the arteries after dissection, and to assess the ability to...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Appendiceal endosalpingiosis: clinical presentation and imaging appearance of a rare condition of the appendix
AbstractEndosalpingiosis rarely affects the appendix but can be mistaken for acute appendicitis or appendiceal tumors. The medical literature regarding appendiceal endosalpingiosis is sparse; consisting of only four case reports which are primarily focused on the histopathology but provide little radiologic correlation. Endosalpingiosis is a rare condition characterized by the presence of benign fallopian tubal-like glandular epithelium derived from Mullerian ducts, usually affecting the serosal surfaces of the pelvis and peritoneum. It is histologically differentiated from endometriosis as endosalpingiosis lacks endometri...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Alpha-fetoprotein assessment for hepatocellular carcinoma after transarterial chemoembolization
AbstractPurposeTo evaluate whether AFP classification criteria correlate with tumor response measured using the European Association for the Study of the Liver (EASL) and predicate survival in patients with hepatocellular carcinoma (HCC) after transarterial chemoembolization (TACE).MethodsData from 143 consecutive patients with unresectable HCC and elevated AFP (>  20 ng/mL), who underwent TACE as initial treatment between January 2011 and December 2015 were collected, retrospectively. AFP response was classified as follows: complete response, normalization of AFP; partial response,>  50% decrease ...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Superparamagnetic iron-oxide-enhanced diffusion-weighted magnetic resonance imaging for the diagnosis of intrapancreatic accessory spleen
AbstractPurposeTo evaluate the diagnostic performance of superparamagnetic iron-oxide (SPIO)-enhanced diffusion-weighted image (DWI) for distinguishing an intrapancreatic accessory spleen from pancreatic tumors.Materials and methodsTwenty-six cases of intrapancreatic accessory spleen and nine cases of pancreatic tail tumors [neuroendocrine tumor (n = 8) and pancreatic adenocarcinoma (n  =  1)] were analyzed. Two blind reviewers retrospectively reviewed the SPIO-enhanced magnetic resonance imaging (MRI) scans. The lesion visibility grades were compared and the diagnostic performance of SPIO-enhan...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

T2 hyperintense myometrial tumors: can MRI features differentiate leiomyomas from leiomyosarcomas?
AbstractPurposeTo establish MRI features that help differentiate atypical leiomyomas and leiomyomas with degeneration that show hyperintensity on T2WI from leiomyosarcomas.Methods and materialsThis retrospective study evaluated 41 women who performed MRI before undergoing hysterectomy and had histologically proven atypical leiomyomas, leiomyomas with degeneration or leiomyosarcomas (21 leiomyomas; 20 leiomyosarcomas); only patients with T2 hyperintense myometrial tumors were included. The association between MRI features (contours; free pelvic fluid; intra-tumoral hemorrhagic areas, T2 heterogeneity; T2 dark areas; flow vo...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

CT and MR imaging of chemotherapy-induced hepatopathy
AbstractChemotherapy-induced hepatopathy includes a wide variety of parenchymal and vascular hepatic changes on imaging, including diffuse or focal hepatopathies (i.e. hepatitis, steatosis, fibrosis, pseudocirrhosis, or sinusoidal obstruction). These changes can profoundly alter the hepatic parenchyma on imaging and result in both false negative and false-positive diagnoses of hepatic metastases and lead to errors in patient management strategies. It is therefore important for radiologists to have a comprehensive knowledge of the imaging patterns that may develop following chemotherapy. The purpose of this review is to exp...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Role of MR texture analysis in histological subtyping and grading of renal cell carcinoma: a preliminary study
AbstractPurposeThe study evaluated the usefulness of magnetic resonance imaging (MRI) texture parameters in differentiating clear cell renal carcinoma (CC-RCC) from non-clear cell carcinoma (NC-RCC) and in the histological grading of CC-RCC.Materials and methodsAfter institutional ethical approval, this retrospective study analyzed 33 patients with 34 RCC masses (29 CC-RCC and five NC-RCC; 19 low-grade and 10 high-grade CC-RCC), who underwent MRI between January 2011 and December 2012 on a 1.5-T scanner (Avanto, Siemens, Erlangen, Germany). The MRI protocol included T2-weighted imaging (T2WI), diffusion-weighted imaging [D...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Reducing radiation dose for multi-phase contrast-enhanced dual energy renal CT: pilot study evaluating prior iterative reconstruction
ConclusionsPrior iterative reconstruction is a new reconstruction method for multi-phase CT examinations that promises to facilitate radiation dose reduction by over 50% for multi-phase DE renal CT exams without compromising CT number or observer performance. (Source: Abdominal Imaging)
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Prostate cancer aggressive prediction: preponderant diagnostic performances of intravoxel incoherent motion (IVIM) imaging and diffusion kurtosis imaging (DKI) beyond ADC at 3.0 T scanner with gleason score at final pathology
ConclusionBoth the IVIM and DKI models are beneficial to predict GS of PCa and indirectly predict its aggressiveness, and they have a comparable diagnostic performance with each other as well as ADC. (Source: Abdominal Imaging)
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

2D shear wave elastography: measurement acquisition and reliability criteria in noninvasive assessment of liver fibrosis
The objective was to evaluate the accuracy of 2D shear wave elastography (SWE) in predicting stages of liver fibrosis using five individual versus grouped measurements and different reliability criteria.Materials and methodsThis is a prospective study of  109 patients who underwent hepatic 2D SWE (Canon Aplio 500) prior to liver biopsy for varied indications. Liver fibrosis was staged using the METAVIR scoring system (F = 0–4). Propagation mapping was used to guide ten SWE measurements from the liver parenchyma: five individual measurements and five grouped measurements. IQR/median, SD/median,...
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

The “curlicue” ureter
(Source: Abdominal Imaging)
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

The “hemorrhage exclusion” sign
(Source: Abdominal Imaging)
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

The “cogwheel” sign of hydrosalpinx
(Source: Abdominal Imaging)
Source: Abdominal Imaging - September 13, 2019 Category: Radiology Source Type: research

Can conventional DWI accurately assess the size of endometrial cancer?
AbstractPurposeTo compare T2-weighted image (T2WI) and conventional Diffusion-weighted image (cDWI) of magnetic resonance imaging (MRI) for sensitivity of qualitative diagnosis and accuracy of tumor size (TS) measurement in endometrial cancer (EC). Meanwhile, the effect of the lesion size itself and tumor grade on the ability of T2WI and cDWI of TS assessment was explored. Ultimately, the reason of deviation on size evaluation was studied.Materials and methods34 patients with EC were enrolled. They were all treated with radical hysterectomy and performed MR examinations before operation. Firstly, the sensitivity of T2WI al...
Source: Abdominal Imaging - September 12, 2019 Category: Radiology Source Type: research

Introduction to the special section on urothelial imaging
(Source: Abdominal Imaging)
Source: Abdominal Imaging - September 12, 2019 Category: Radiology Source Type: research

Cross-sectional imaging-based severity scoring of chronic pancreatitis: why it is necessary and how it can be done
AbstractChronic pancreatitis (CP) remains a diagnostic challenge as clinical symptoms are non-specific, histopathological appearances are varied and pathogenesis remains incompletely understood. Multiple classifications and grading systems have been proposed for CP, but none leverage the full capabilities of cross-sectional imaging modalities and are not widely accepted or validated. CT and MRI/MRCP are useful in identifying a wide spectrum of histopathological changes in CP and can also assess exocrine reserve of pancreas. Advanced MRI techniques such as T1 mapping and extracellular volume fraction can potentially identif...
Source: Abdominal Imaging - September 11, 2019 Category: Radiology Source Type: research

Incidentally detected biliary ductal dilatation on contrast-enhanced CT: what is the incidence of occult obstructing malignancy?
ConclusionAsymptomatic biliary ductal dilatation incidentally detected and without identifiable cause on contrast-enhanced CT is likely benign in patients with normal LFTs, and further workup may not be warranted. (Source: Abdominal Imaging)
Source: Abdominal Imaging - September 11, 2019 Category: Radiology Source Type: research

Gastrointestinal stromal tumors (GIST): a proposal of a “CT-based predictive model of Miettinen index” in predicting the risk of malignancy
AbstractPurposeTo identify the predictors of malignancy on CT for the evaluation of gastrointestinal stromal tumors (GIST) by correlating CT findings with the mitotic index in order to propose a “CT-based predictive model of Miettinen index.”MethodsOne radiologist and one resident in radiology with 14- and 4-year experience in oncological field reviewed the CT findings of 42 patients by consensus, with respect to lesion site, size, contour, tumor growth pattern, enhancing pattern, degree of enhancement of tumor, percentage of tumor necrosis, mesenteric fat infiltration, ulceration, calcification, regional lymph...
Source: Abdominal Imaging - September 10, 2019 Category: Radiology Source Type: research

Update on MR Imaging of cystic retroperitoneal masses
ConclusionLymphangiomas are the most common RP cystic masses and typically appear simple; microscopic fat is a specific but insensitive finding. Location, internal complexity, and enhancement pattern suggest alternative diagnoses which range from normal anatomic variants to congenital abnormalities and importantly include benign, neurogenic, and malignant neoplasms. An approach to the MR imaging of cystic RP masses is presented. (Source: Abdominal Imaging)
Source: Abdominal Imaging - September 9, 2019 Category: Radiology Source Type: research

Acute pancreatitis: an update on the revised Atlanta classification
AbstractAcute pancreatitis (AP) is the most common gastrointestinal disease resulting in hospitalization in the United States with reports of over 270,000 hospitalizations and costs up to 2.6 billion dollars per year. AP is highly variable in disease course and outcome. Established in 1992, the original Atlanta classification system aimed to categorize the wide spectrum of AP by creating consensus-based terminology for AP types, severity, and complications. Though the original system standardized terminology, certain terms and definitions (i.e. pancreatic abscess) were unclear and often misused. The 2012 revised Atlanta cl...
Source: Abdominal Imaging - September 7, 2019 Category: Radiology Source Type: research

Computed tomography  (CT) in the evaluation of bladder and ureteral trauma: indications, technique, and diagnosis
ConclusionCT cystography and CT urography are effective tools in identifying potentially serious injuries to the genitourinary system. Timely recognition of these injuries can be crucial for the overall management and prognosis. (Source: Abdominal Imaging)
Source: Abdominal Imaging - September 7, 2019 Category: Radiology Source Type: research

Defecation versus pre- and post-defecation Valsalva maneuvers for dynamic MR assessment of pelvic floor dysfunction
AbstractPurposeTo compare prevalence and severity of multi-compartment pelvic floor dysfunction between supine magnetic resonance defecography with defecation (MRD) and supine dynamic MRI during Valsalva, both with and without  rectal distention.MethodsThis was an IRB-approved, HIPAA-compliant retrospective review of consecutive patients referred for MR Defecography. MRD protocol included imaging at rest, during pre-defecation Valsalva (Pre-DV), defecation (Def), and post-defecation Valsalva (Post-DV). The Post-DV images were performed after complete evacuation either during the defecation acquisition or, in cases whe...
Source: Abdominal Imaging - September 7, 2019 Category: Radiology Source Type: research

Differentiation of focal autoimmune pancreatitis from pancreatic ductal adenocarcinoma
AbstractAutoimmune pancreatitis (AIP) is an inflammatory process of the pancreas that occurs most commonly in elderly males and clinically can mimic pancreatic adenocarcinoma and present with jaundice, weight loss, and abdominal pain. Mass-forming lesions in the pancreas are seen in the focal form of AIP and both clinical and imaging findings can overlap those of  pancreatic cancer. The accurate distinction of AIP from pancreatic cancer is of utmost importance as it means avoiding unnecessary surgery in AIP cases or inaccurate steroid treatment in patients with pancreatic cancer. Imaging concomitantly with serolo...
Source: Abdominal Imaging - September 6, 2019 Category: Radiology Source Type: research