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https://www.readbyqxmd.com/read/28628416/case-243-extramedullary-hematopoiesis-in-an-adrenal-myelolipoma
#1
James Tanner, Shalini Malhotra, Hesham El-Daly, Edmund M Godfrey
History A 30-year-old man presented to the emergency department with epigastric pain. He was vomiting and in distress, and he had a history of thalassemia. Physical examination findings were unremarkable. Pertinent blood results were a hemoglobin level of 10.5 g/dL (6.52 mmol/L) (normal range, 13.5-18.0 g/dL [8.38-11.17 mmol/L]) and a bilirubin level of 62 µmol/L (normal range, 3-17 µmol/L). The remaining hematologic and biochemical results were normal. Aortic dissection was suspected clinically, so the patient was referred for imaging...
July 2017: Radiology
https://www.readbyqxmd.com/read/28624923/a-comparison-of-enhancement-patterns-on-dynamic-enhanced-ct-and-survival-between-patients-with-pancreatic-neuroendocrine-tumors-with-and-without-intratumoral-fibrosis
#2
Cherry Kim, Jae Ho Byun, Seung-Mo Hong, Soyeon An, Jin Hee Kim, Seung Soo Lee, Hyoung Jung Kim
PURPOSE: To compare CT findings and survival between patients with pancreatic neuroendocrine tumors (pNETs) with and without fibrosis. METHODS: Forty-five pNET patients with intratumoral fibrosis (group A) were matched for age, gender, and tumor size and grade with 45 pNET patients without (group B), and CT images were retrospectively reviewed. Hounsfield units (HUs) of tumors in unenhanced, arterial and portal phases, HU ratio (tumor to normal parenchyma) in each phase, enhancement patterns, visible enhancement pattern changes, and survival were compared...
June 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28624025/quantitative-computed-tomography-texture-analysis-for-estimating-histological-subtypes-of-thymic-epithelial-tumors
#3
Koichiro Yasaka, Hiroyuki Akai, Masanori Nojima, Aya Shinozaki-Ushiku, Masashi Fukayama, Jun Nakajima, Kuni Ohtomo, Shigeru Kiryu
OBJECTIVES: To investigate whether high-risk thymic epithelial tumor (TET) (HTET) can be differentiated from low-risk TET (LTET) using computed tomography (CT) quantitative texture analysis. MATERIALS AND METHODS: The data of 39 patients (mean age, 58.6±14.1 years) (39 unenhanced CT (UECT) and 33 contrast-enhanced CT (CECT)) who underwent thymectomy for TET were retrospectively analyzed. A region of interest was placed to include the entire TET within the slice at its maximum diameter...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28624023/enhanced-radiation-damage-caused-by-iodinated-contrast-agents-during-ct-examination
#4
Ling Wang, Qiang Li, Xi-Ming Wang, Guang-Yu Hao, Jie-Bao, Su Hu, Chun-Hong Hu
OBJECTIVE: To access the effect of iodinate contrast agent (ICA) on DNA double-stand breaks (DSBs) in human peripheral blood lymphocytes during computed tomography (CT) examinations. MATERIALS AND METHODS: This present study was approved by the institutional ethics committee; written informed patient consent was obtained from 70 patients. A total of 48 patients underwent computed tomography urography (CTU), in which only one time CT scanning was examined after injecting ICA, and 22 patients received unenhanced whole abdominal CT, among them 10 patients were selected to get ICA injection immediately after irradiation...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28609114/do-incidental-hyperechoic-renal-lesions-measuring-up-to-1-cm-warrant-further-imaging-outcomes-of-161-lesions
#5
Ankur M Doshi, Abimbola Ayoola, Andrew B Rosenkrantz
OBJECTIVE: The purpose of this study was to determine the outcomes of hyperechoic renal lesions measuring 1 cm or less at ultrasound examination. MATERIALS AND METHODS: This retrospective study included 161 hyperechoic renal lesions measuring 1 cm or less at ultrasound that were evaluated with follow-up ultrasound, CT, or MRI. Follow-up imaging examinations were reviewed to assess for definitive lesion characterization or size stability. RESULTS: Follow-up included 11 unenhanced CT, 39 contrast-enhanced CT, 52 unenhanced and contrast-enhanced CT, two unenhanced MRI, 50 unenhanced and contrast-enhanced MRI, and 87 ultrasound examinations...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28550477/iodinated-contrast-agents-in-patients-with-myasthenia-gravis-a-retrospective-cohort-study
#6
Jakob Rath, Matthias Mauritz, Gudrun Zulehner, Eva Hilger, Hakan Cetin, Gregor Kasprian, Eduard Auff, Fritz Zimprich
Currently, it has not been satisfactorily established, whether modern low-osmolality iodinated contrast agents (ICAs) used in computed tomography (CT) studies are a risk factor for exacerbation of myasthenic symptoms. The rate of acute adverse events as well as delayed clinical worsening up to 30 days were analyzed in 73 patients with confirmed myasthenia gravis (MG) who underwent contrast-enhanced CT studies and compared to 52 patients who underwent unenhanced CT studies. One acute adverse event was documented...
June 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28537759/imaging-evaluation-of-nonacute-shoulder-pain
#7
Michael J Tuite, Kirstin M Small
OBJECTIVE: A variety of radiographic views have been described in the literature for the initial imaging of nonacute shoulder pain. Multiple articles have also discussed the best next imaging test if radiographs do not show the diagnosis, especially the use of unenhanced MRI, MR arthrography, CT arthrography, and ultrasound. The purpose of this article is to examine the evidence for the most helpful radiographic views and the best imaging test after radiographs for different clinical presentations of chronic shoulder pain...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28536753/differentiation-of-clot-composition-using-conventional-and-dual-energy-computed-tomography
#8
Jan Borggrefe, Jonathan Kottlors, Mahmood Mirza, Victor-Frederic Neuhaus, Nuran Abdullayev, Volker Maus, Christoph Kabbasch, David Maintz, Anastasios Mpotsaris
BACKGROUND AND PURPOSE: In unenhanced computed tomography (CT) of acute ischemic stroke, the density of occluding clots is associated with the content of red blood cells and successful recanalization with stent thrombectomy. However, no CT marker for fibrin content is established. In order to improve clot diagnostics, we conducted an in vitro study to investigate thrombus composition of histologically defined ovine blood clots with unenhanced and contrast-enhanced CT using spectral detector CT (SDCT)...
May 23, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28536603/impact-of-fatty-liver-on-acute-pancreatitis-severity
#9
Seung Bae Yoon, In Seok Lee, Moon Hyung Choi, Kyungjin Lee, Hyoju Ham, Hyun Jin Oh, Se Hwan Park, Chul-Hyun Lim, Myung-Gyu Choi
Aim. Acute pancreatitis is typically a mild disease, but some patients develop severe courses. Fatty liver changes are seen in patients with acute pancreatitis, but its clinical significance has not been well-studied. We aimed to investigate the relationship between fatty liver and the severity of acute pancreatitis. Methods. Unenhanced CT images of patients with acute pancreatitis were retrospectively reviewed by a radiologist, and mean hepatic and splenic attenuation was measured in Hounsfield units (HU)...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28516271/three-dimensional-image-fusion-guidance-for-transjugular-intrahepatic-portosystemic-shunt-placement
#10
Vania Tacher, Arthur Petit, Haytham Derbel, Luigi Novelli, Manuel Vitellius, Fourat Ridouani, Alain Luciani, Alain Rahmouni, Christophe Duvoux, Chady Salloum, Mélanie Chiaradia, Hicham Kobeiter
INTRODUCTION: To assess the safety, feasibility and effectiveness of image fusion guidance with pre-procedural portal phase computed tomography with intraprocedural fluoroscopy for transjugular intrahepatic portosystemic shunt (TIPS) placement. MATERIALS AND METHODS: All consecutive cirrhotic patients presenting at our interventional unit for TIPS creation from January 2015 to January 2016 were prospectively enrolled. Procedures were performed under general anesthesia in an interventional suite equipped with flat panel detector, cone-beam computed tomography (CBCT) and image fusion technique...
May 17, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28515805/is-computed-tomography-defined-obstruction-a-predictor-of-urological-intervention-in-emergency-department-patients-presenting-with-renal-colic
#11
Peter Alexander Massaro, Avinash Kanji, Paul Atkinson, Ryan Pawsey, Tom Whelan
INTRODUCTION: Our objective was to determine whether unilateral calculus-induced ureteric obstruction on computed tomography (CT) was independently associated with the need for urological intervention and 30-day return to the emergency department (ED). METHODS: We performed a retrospective cohort study of patients with symptomatic urinary calculi diagnosed by unenhanced helical CT. Stepwise regression analysis was used to determine the predictors of urological intervention and 30-day return to the ED...
March 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28501848/mucinous-adenocarcinoma-and-non-mucinous-adenocarcinoma-differing-clinicopathological-characteristics-and-computed-tomography-features-in-gastric-cancer
#12
Jianxi Zhao, Gang Ren, Rong Cai, Jian Chen, Huali Li, Chen Guo, Wenguang He, Xiangru Wu, Wenjie Zhang
Mucinous gastric carcinoma (MGC) is a rare histological subtype of gastric cancer. The clinicopathological characteristics and CT features of MGC remain controversial. This study aimed to determine the clinicopathological characteristics and CT features of MGC. We reviewed 62 patients with MGC and 104 patients with non-mucinous gastric carcinoma (NMGC), pathologically confirmed between 2003 and 2015. There are significant differences in some clinicopathological characteristics and CT features between MGC and NMGC...
April 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28473090/acr-appropriateness-criteria-%C3%A2-suspected-physical-abuse-child
#13
Sandra L Wootton-Gorges, Bruno P Soares, Adina L Alazraki, Sudha A Anupindi, Jeffrey P Blount, Timothy N Booth, Molly E Dempsey, Richard A Falcone, Laura L Hayes, Abhaya V Kulkarni, Sonia Partap, Cynthia K Rigsby, Maura E Ryan, Nabile M Safdar, Andrew T Trout, Roger F Widmann, Boaz K Karmazyn, Susan Palasis
The youngest children, particularly in the first year of life, are the most vulnerable to physical abuse. Skeletal survey is the universal screening examination in children 24 months of age and younger. Fractures occur in over half of abused children. Rib fractures may be the only abnormality in about 30%. A repeat limited skeletal survey after 2 weeks can detect additional fractures and can provide fracture dating information. The type and extent of additional imaging for pediatric patients being evaluated for suspected physical abuse depends on the age of the child, the presence of neurologic signs and symptoms, evidence of thoracic or abdominopelvic injuries, and social considerations...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28470401/low-dose-attenuation-correction-in-diagnosis-of-non-alcoholic-fatty-liver-disease
#14
Amjad M Ahmed, Mohamed E Ebid, Amr M Ajlan, Mouaz H Al-Mallah
BACKGROUND: Non-enhanced computed tomography (CT) is a valuable modality in the diagnosis of non-alcoholic fatty liver disease (NAFLD). However, it is not clear if low-dose CT attenuation correction (CTAC) scans have the same accuracy to diagnose NAFLD. Our aim is to evaluate the diagnostic accuracy of low-dose CTAC in the diagnosis of NAFLD using non-enhanced CT as a gold standard. METHODS: A total of 864 patients who underwent a clinically indicated hybrid nuclear imaging scanning between May 2011 and April 2014 were included in the study...
May 3, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28445910/influence-of-contrast-media-on-bone-mineral-density-bmd-measurements-from-routine-contrast-enhanced-mdct-datasets-using-a-phantom-less-bmd-measurement-tool
#15
Andrea Toelly, Constanze Bardach, Michael Weber, Rui Gong, Yanbo Lai, Pei Wang, Yulin Guo, Jan Kirschke, Thomas Baum, Michael Gruber
Aim To evaluate the differences in phantom-less bone mineral density (BMD) measurements in contrast-enhanced routine MDCT scans at different contrast phases, and to develop an algorithm for calculating a reliable BMD value. Materials and Methods 112 postmenopausal women from the age of 40 to 77 years (mean age: 57.31 years; SD 9.61) who underwent a clinically indicated MDCT scan, consisting of an unenhanced, an arterial, and a venous phase, were included. A retrospective analysis of the BMD values of the Th12 to L4 vertebrae in each phase was performed using a commercially available phantom-less measurement tool...
June 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28437714/additional-value-of-venous-phase-added-to-aortic-ct-angiography-in-patients-with-aortic-aneurysm
#16
Yukichi Tanahashi, Satoshi Goshima, Hiroshi Kondo, Yoshifumi Noda, Kota Sakurai, Hiroshi Kawada, Nobuyuki Kawai, Shigeru Furui, Masayuki Matsuo
PURPOSE: To compare diagnostic performance of unenhanced and CTA images (Image set 1) to that of combined unenhanced, CTA, and venous-phase images (Image set 2) for incidentalomas in patients with aortic aneurysm. METHODS: Preoperative CT Images of consecutive 240 patients were reviewed by two observers for incidentalomas. Diagnostic performance was assessed. RESULTS: Sensitivity was higher in Image set 2 than Image set 1 in observer 1 and overall (P=0...
April 13, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28431167/performance-of-18f-fdg-pet-ct-in-the-characterization-of-adrenal-masses-in-non-cancer-patients-a-prospective-study
#17
Carole Guerin, François Pattou, Laurent Brunaud, Jean-Christophe Lifante, Eric Mirallié, Magalie Haissaguerre, Damien Huglo, Pierre Olivier, Claire Houzard, Catherine Ansquer, Elif Hindié, Anderson Loundou, Cendrine Archange, Antoine Tabarin, Fréderic Sebag, Karine Baumstarck, David Taïeb
Context: Few prospective studies have evaluated the role of 18F-Fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in the characterization of adrenal masses. Objective: To assess the performance of 18F-FDG PET/CT in the malignancy diagnosis of adrenal masses in non-cancer patients. Design: Prospective multicenter study. Material and methods: The study population consisted of 87 patients (87 adrenal masses) referred to endocrine surgeons: 56 with mass diameter ≥40 mm and 31 with a diameter <40 mm and of indeterminate nature based on unenhanced and washout CT attenuation densities...
April 20, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28422825/interdigitating-dendritic-cell-sarcoma-presenting-in-the-sigmoid-colon-mesentery-a-case-report-and-literature-review
#18
REVIEW
Jianguo Zhu, Sheng Su, Jinfa Zhou, Haige Li
RATIONALE: Interdigitating dendritic cell sarcoma (IDCS) is an extremely rare disease. It commonly occurs in middle-aged males and mainly involves the lymph nodes. Pathological examination plays an important role in differentiating from other tumors, but far less published literature focuses on the imaging characteristics of IDCS. PATIENT CONCERNS: Here, we reported a case of IDCS in a 52-year-old male involving the pelvis with medical imaging and pathologic findings...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28422806/improvement-of-image-quality-in-unenhanced-dual-layer-ct-of-the-head-using-virtual-monoenergetic-images-compared-with-polyenergetic-single-energy-ct
#19
Victor Neuhaus, Nuran Abdullayev, Nils Große Hokamp, Gregor Pahn, Christoph Kabbasch, Anastasios Mpotsaris, David Maintz, Jan Borggrefe
OBJECTIVES: The aims of this study were to compare virtual monoenergetic images and polyenergetic images reconstructed from unenhanced dual-layer detector computed tomography (DLCT) of the head and to determine kiloelectron volt levels that optimize image quality, particularly the gray-white matter contrast, and reduce beam hardening artifacts caused by the skull. MATERIALS AND METHODS: Institutional review board approval was obtained. Forty patients that received DLCT were included in this retrospective study; of these patients, 22 were women and 18 were men...
April 19, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28419484/variations-in-the-functional-visual-field-for-detection-of-lung-nodules-on-chest-computed-tomography-impact-of-nodule-size-distance-and-local-lung-complexity
#20
Lukas Ebner, Martin Tall, Kingshuk Roy Choudhury, Donald L Ly, Justus E Roos, Sandy Napel, Geoffrey D Rubin
PURPOSE: To explore the characteristics that impact lung nodule detection by peripheral vision when searching for lung nodules on chest CT-scans. METHODS: This study was approved by the local IRB and is HIPAA compliant. A simulated primary (1°) target mass (2 × 2 × 5 cm) was embedded into 5 cm thick subvolumes (SV) extracted from three unenhanced lung MDCT scans (64 row, 1.25 mm thickness, 0.7 mm increment). One of 30 solid, secondary nodules with either 3-4 mm and 5-8 mm diameters were embedded into 192 of 207 SVs...
April 17, 2017: Medical Physics
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