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https://www.readbyqxmd.com/read/28429055/diagnostic-value-of-fourth-generation-iterative-reconstruction-algorithm-with-low-dose-ct-protocol-in-assessment-of-mesorectal-fascia-invasion-in-rectal-cancer-comparison-with-magnetic-resonance
#1
Davide Ippolito, Silvia Girolama Drago, C R Talei Franzesi, Alessandra Casiraghi, Sandro Sironi
PURPOSE: The purpose of the article is to compare the diagnostic performance about radiation dose and image quality of low-dose CT with iterative reconstruction algorithm (iDose4) and standard-dose CT in the assessment of mesorectal fascia (MRF) invasion in rectal cancer patients. MATERIALS AND METHODS: Ninety-one patients with biopsy-proven primary rectal adenocarcinoma underwent CT staging: 42 underwent low-dose CT, 49 underwent standard CT protocol. Low-dose contrast-enhanced MDCT scans were performed on a 256 (ICT, Philips) scanner using 120 kV, automated mAs modulation, iDose4 iterative reconstruction algorithm...
April 20, 2017: Abdominal 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
#2
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 HIPAA compliant. A simulated primary (1°) target mass (2 x 2 x 5 cm) was embedded into 5-cm thick sub-volumes (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
https://www.readbyqxmd.com/read/28418840/distinct-mdct-imaging-features-to-differential-diagnosis-of-hepatic-paragonimiasis-and-small-hepatocellular-carcinoma
#3
Sheng Zhang, Si-Ming Xie, Yong-Hua Chen, Xu-Bao Liu, Gang Mai
We used multi-row detector computed tomography (MDCT) to identify the distinguishing characteristics of hepatic paragonimiasis and small hepatocellular carcinoma lesions. We analyzed a cohort of 60 patients, of which 26 had hepatic paragonimiasis and 34 with a small (≤ 3cm) hepatocellular carcinoma. MDCT detected 65 lesions that were retrospectively reviewed and analyzed based on their imaging features. Both groups showed distinct MDCT imaging features that could contribute to an accurate diagnosis. In the paragonimiasis group, 75% (21/28) lesions were located in the hepatic subcapsular region, whereas only 10...
March 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28409316/mental-foramen-and-lingual-vascular-canals-of-mandible-on-mdct-images-anatomical-study-and-review-of-the-literature
#4
Filiz Direk, Ismihan Ilknur Uysal, Ali Sami Kivrak, Zeliha Fazliogullari, Nadire Unver Dogan, Ahmet Kagan Karabulut
The mental foramen and lingual vascular canals are related to vessels and nerves in the mandibular body. The aim of the present study was to determine the number and location of these structures and to make measurements of them. The archived Multidetector Computed Tomography images of 100 adult (15- to 70-year-old) patients were evaluated retrospectively. The diameters of the mental foramens and their distances from the front, back, upper and lower reference points were measured. The distribution of mental foramens with respect to the teeth was also researched...
April 13, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28409202/imaging-evaluation-of-ablative-margin-and-index-tumor-immediately-after-radiofrequency-ablation-for-hepatocellular-carcinoma-comparison-between-multidetector-row-ct-and-mr-imaging
#5
Sung Mo Kim, Sang Soo Shin, Byung Chan Lee, Jin Woong Kim, Suk Hee Heo, Hyo Soon Lim, Yong Yeon Jeong
PURPOSE: To prospectively compare multidetector-row CT (MDCT) and MR imaging (MRI) in the assessment of the ablative margin (AM) and index tumor immediately after radiofrequency (RF) ablation for hepatocellular carcinoma (HCC) and assess whether non-contrast MRI with limited sequences (T1- and T2-weighted imaging only) was superior to a conventional MDCT protocol. METHODS: A total of 33 consecutive patients with 42 HCCs were included in this study. Both MDCT and MR images were independently reviewed by two radiologists regarding the ability to visually discriminate between the AM and index tumor, and the AM status within ablation zones...
April 13, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28401281/ct-angiography-and-3d-imaging-in-aortoiliac-occlusive-disease-collateral-pathways-in-leriche-syndrome
#6
REVIEW
Sameer Ahmed, Siva P Raman, Elliot K Fishman
Collateral pathways in aortoiliac occlusive disease are essential for arterial blood flow to the abdomen, pelvis, and lower extremities. These pathways can be broadly divided into systemic-systemic, visceral-visceral, and systemic-visceral collateral networks. MDCT angiography is the most commonly used modality for the diagnostic evaluation of patients with aortoiliac occlusive disease, allowing excellent evaluation of stenotic arterial segments, as well as beautifully illustrating resulting collateral pathways (particularly when utilizing 3D reconstruction techniques)...
April 11, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28392914/the-use-of-super-selective-mesenteric-embolisation-as-a-first-line-management-of-acute-lower-gastrointestinal-bleeding
#7
Bryan Soh, Steven Chan
INTRODUCTION: In this study, we aim to assess the efficacy and safety of digital subtraction angiography (DSA) and super-selective mesenteric artery embolisation in managing lower gastrointestinal bleeding (LGIB) at a multi-centre health service in Melbourne (Australia). METHOD: A retrospective case series of patients with LGIB treated with superselective embolisation in our area health service. Patients with confirmed active LGIB, on either radionuclide scintigraphy (RS) or contrast-enhanced multi-detector CT angiography (CE-MDCT), were referred for DSA, and subsequently endovascular intervention...
May 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28392311/two-examples-of-indication-specific-radiation-dose-calculations-in-dental-cbct-and-multidetector-ct-scanners
#8
Andreas Stratis, Guozhi Zhang, Xochitl Lopez-Rendon, Constantinus Politis, Robert Hermans, Reinhilde Jacobs, Ria Bogaerts, Eman Shaheen, Hilde Bosmans
PURPOSE: To calculate organ doses and estimate the effective dose for justification purposes in patients undergoing orthognathic treatment planning purposes and temporal bone imaging in dental cone beam CT (CBCT) and Multidetector CT (MDCT) scanners. METHODS: The radiation dose to the ICRP reference male voxel phantom was calculated for dedicated orthognathic treatment planning acquisitions via Monte Carlo simulations in two dental CBCT scanners, Promax 3D Max (Planmeca, FI) and NewTom VGi evo (QR s...
April 6, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28384896/significance-of-blood-eosinophil-count-in-patients-with-chronic-rhinosinusitis-with-nasal-polyposis
#9
Ammu Sreeparvathi, Lathi Kumari Kalyanikuttyamma, Madhumita Kumar, Nandagopan Sreekumar, Narendrakumar Veerasigamani
INTRODUCTION: Chronic Rhino Sinusitis (CRS) is one of the most prevalent chronic illnesses across the globe, affecting persons of all ages. It is an inflammatory process that involves the paranasal sinuses with symptoms lasting longer than 12 weeks. AIM: To establish the significance of blood eosinophil (count) levels in CRS with nasal polyps and to compare blood eosinophil count with eosinophil count in the histopathology specimens of the polyps. MATERIALS AND METHODS: This was a retrospective study done to review the medical records of 63 patients who underwent endoscopic sinus surgery for CRS with Nasal polyps...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28383435/asymptomatic-hyperuricemia-is-independently-associated-with-coronary-artery-calcification-in-the-absence-of-overt-coronary-artery-disease-a-single-center-cross-sectional-study
#10
Hyunwook Kim, Seok-Hyung Kim, Ah Ran Choi, Seungkyu Kim, Hoon Young Choi, Hyung Jong Kim, Hyeong-Cheon Park
Recently, the pathogenic role of uric acid (UA) in both systemic metabolic and atherosclerotic diseases has been investigated. We sought to determine the independent correlation between serum UA levels and coronary artery calcification, as a marker of subclinical atherosclerosis. A total of 4188 individuals without prior coronary artery disease or urate-deposition disease were included. All of the participants underwent multidetector computed tomography (MDCT) for the evaluation of coronary artery calcification (CAC) during their health check-ups...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28378236/a-new-low-dose-multi-phase-trauma-ct-protocol-and-its-impact-on-diagnostic-assessment-and-radiation-dose-in-multi-trauma-patients
#11
Zlatan Alagic, Andreas Eriksson, Erika Drageryd, Sara Rezaei Motamed, Marius C Wick
PURPOSE: Computed tomography (CT) examinations, often using high-radiation dosages, are increasingly used in the acute management of polytrauma patients. This study compares a low-dose polytrauma multi-phase whole-body CT (WBCT) protocol on a latest generation of 16-cm detector 258-slice multi-detector CT (MDCT) scanner with advanced dose reduction techniques to a single-phase polytrauma WBCT protocol on a 64-slice MDCT scanner. METHODS: Between March and September 2015, 109 polytrauma patients (group A) underwent acute WBCT with a low-dose multi-phase WBCT protocol on a 258-slice MDCT whereas 110 polytrauma patients (group B) underwent single-phase trauma CT on a 64-slice MDCT...
April 5, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28378082/diagnostic-performance-of-endoscopic-ultrasound-for-detection-of-pancreatic-malignancy-following-an-indeterminate-multidetector-ct-scan-a-systemic-review-and-meta-analysis
#12
Somashekar G Krishna, Bhavana B Rao, Emmanuel Ugbarugba, Zarine K Shah, Alecia Blaszczak, Alice Hinton, Darwin L Conwell, Phil A Hart
BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) has a dismal prognosis in part due to delayed diagnosis. Even with advances in cross-sectional imaging, small pancreatic malignancies can be missed. We sought to determine the performance of endoscopic ultrasound (EUS) in those without an obvious mass on multi-detector CT scan (MDCT), but with clinical suspicion for pancreatic malignancy. METHODS: Multiple databases were systematically searched to identify studies that assessed the diagnostic performance of EUS after negative or inconclusive pancreatic protocol MDCT for detection of pancreatic malignancy when clinically suspected...
April 4, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28377947/the-accuracy-and-sensitivity-of-diffusion-weighted-magnetic-resonance-imaging-with-apparent-diffusion-coefficients-in-diagnosis-of-recurrent-cholesteatoma
#13
Nasr Mohamed M Osman, Ahmed Abdel Rahman, Moustafa Talaat Abdel Hakim Ali
OBJECTIVE: To evaluate the accuracy and sensitivity of diffusion-weighted magnetic resonance imaging with ADC value combined with MDCT in evaluating recurrent cholesteatoma. PATIENTS: Thirty patients (20 females and 10 males), their age ranged from 10 to 40years, had undergone a tympanomastoid surgery for a cholesteatoma of the middle ear underwent MDCT and MR DWI examination before second- or third-look surgery from May 2015 to October 2016. RESULTS: CT showed partial opacification of the tympanomastoid cavity in 10 ears and complete opacification in 21 ears...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/28376281/differentiation-of-fat-poor-angiomyolipoma-from-clear-cell-renal-cell-carcinoma-in-contrast-enhanced-mdct-images-using-quantitative-feature-classification
#14
Han Sang Lee, Helen Hong, Dae Chul Jung, Seunghyun Park, Junmo Kim
PURPOSE: To develop a computer-aided classification system to differentiate benign fat-poor angiomyolipoma (fp-AML) from malignant clear-cell renal cell carcinoma (ccRCC) using quantitative feature classification on histogram and texture patterns from contrast-enhanced multi-detector computer tomography (CE MDCT) images. METHODS: A dataset including 50 CE MDCT images of 25 fp-AML and 25 ccRCC patients was used. From these images, the tumors were manually segmented by an expert radiologist to define the regions of interest (ROI)...
April 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28374213/contour-variations-of-the-body-and-tail-of-the-pancreas-evaluation-with-mdct
#15
Ahmad Khalid Omeri, Shunro Matsumoto, Maki Kiyonaga, Ryo Takaji, Yasunari Yamada, Kazuhisa Kosen, Hiromu Mori, Hidetoshi Miyake
PURPOSE: To analyze morphology/contour variations of the pancreatic body and tail in subjects free of pancreatic disease. METHODS: We retrospectively reviewed triple-phase, contrast-enhanced multi-detector row computed tomography (3P-CE-MDCT) examinations of 449 patients who had no clinical or CT evidence of pancreatic diseases. These patients were evaluated for morphologic/contour variations of the pancreatic body and tail, which were classified into two types...
April 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28369242/transcatheter-aortic-valve-thrombosis-the-relation-between-hypo-attenuated-leaflet-thickening-abnormal-valve-haemodynamics-and-stroke
#16
E Mara Vollema, William K F Kong, Spyridon Katsanos, Vasileios Kamperidis, Philippe J van Rosendael, Frank van der Kley, Arend de Weger, Nina Ajmone Marsan, Victoria Delgado, Jeroen J Bax
Aims: The presence of hypo-attenuated leaflet thickening (HALT) and/or reduced leaflet motion on multi-detector row computed tomography (MDCT) has been proposed as a possible marker for early transcatheter aortic valve thrombosis. However, its association with abnormal valve haemodynamics on echocardiography (another potential marker of thrombosis) and clinical outcomes (stroke) remains unclear. The present study evaluated the prevalence of HALT on MDCT and abnormal valve haemodynamics on echocardiography...
March 27, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28360410/a-case-with-recurrent-free-floating-ball-thrombi-in-left-atrium
#17
Takayuki Yoshioka, Takeshige Mori, Yayoi Taniguchi, Sonoko Hirayama, Toru Ozawa, Sachiyo Iwata, Asumi Takei, Nobutaka Inoue
BACKGROUND A free-floating ball thrombus in the left atrium is a rare clinical condition. However, the diagnosis of this condition has been facilitated by the advent and development of echocardiography and multi-detector row computed tomography (MDCT) and several cases have been reported. CASE REPORT We report a case of a 75-year-old woman who had recurrent giant spherical thrombi in the left atrium. She was diagnosed with chronic atrial fibrillation at 52 years of age. A pacemaker implantation was performed at 54 years of age because of a complete atrioventricular block; and mitral valve replacement was performed for severe mitral regurgitation at 62 years of age...
March 31, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28345300/primary-intestinal-lymphangiectasia-multiple-detector-computed-tomography-findings-after-direct-lymphangiography
#18
Xiaoli Sun, Wenbin Shen, Xiaobai Chen, Tingguo Wen, Yongli Duan, Rengui Wang
INTRODUCTION: To analyse the findings of multiple detector computed tomography (MDCT) after direct lymphangiography in primary intestinal lymphangiectasia (PIL). METHODS: Fifty-five patients with PIL were retrospectively reviewed. All patients underwent MDCT after direct lymphangiography. The pathologies of 16 patients were confirmed by surgery and the remaining 39 patients were confirmed by gastroendoscopy and/or capsule endoscopy. RESULTS: After direct lymphangiography, MDCT found intra- and extraintestinal as well as lymphatic vessel abnormalities...
March 27, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28344199/association-of-toll-like-receptor-4-on-human-monocyte-subsets-and-vulnerability-characteristics-of-coronary-plaque-as-assessed-by-64-slice-multidetector-computed-tomography
#19
Yuichi Ozaki, Toshio Imanishi, Seiki Hosokawa, Tsuyoshi Nishiguchi, Akira Taruya, Takashi Tanimoto, Akio Kuroi, Takashi Yamano, Yoshiki Matsuo, Yasushi Ino, Hironori Kitabata, Takashi Kubo, Atsushi Tanaka, Takashi Akasaka
BACKGROUND: Although Toll-like receptor 4 (TLR-4) is involved in monocyte activation in patients with accelerated forms of atherosclerosis, the relationship between the expression of TLR-4 on circulating monocytes and coronary plaque vulnerability has not previously been evaluated. We investigated this relationship using 64-slice multidetector computed tomography (MDCT) in patients with stable angina pectoris (SAP).Methods and Results:We enrolled 65 patients with SAP who underwent MDCT...
March 24, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28328258/value-of-mdct-and-clinical-and-laboratory-data-for-predicting-the-need-for-surgical-intervention-in-suspected-small-bowel-obstruction
#20
Andrew Scrima, Meghan G Lubner, Scott King, Joshua Pankratz, Gregory Kennedy, Perry J Pickhardt
OBJECTIVE: The purpose of this article is to assess the value of a large panel of clinical and MDCT variables in patients with suspected small-bowel obstruction (SBO) for predicting urgent surgical intervention (< 72 hours), bowel ischemia, and bowel resection. MATERIALS AND METHODS: MDCT studies performed at admission for 179 nonconsecutive adults (mean age, 55.8 years; 86 men and 93 women) with suspected SBO were retrospectively reviewed by three board-certified radiologists...
April 2017: AJR. American Journal of Roentgenology
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