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Ryo Takaji, Shunro Matsumoto, Maki Kiyonaga, Yasunari Yamada, Hiromu Mori, Yukio Iwashita, Masayuki Ohta, Masafumi Inomata, Naoki Hijiya, Masatsugu Moriyama, Hajime Takaki, Kengo Fukuzawa, Hirotoshi Yonemasu
OBJECTIVES: Periportal low attenuation (PPLA) associated with metastatic liver cancer is occasionally seen on multi-detector-row CT (MDCT). The purpose of this study was to investigate the MDCT patterns of the PPLA and to correlate it with pathological findings. METHODS: We retrospectively reviewed the MDCT images of 63 patients with metastatic liver cancers from colorectal adenocarcinoma. On MDCT scans, PPLA associated with liver metastasis was visualized in six patients with colorectal cancer...
October 25, 2016: Japanese Journal of Radiology
Jennifer Xu, Alejandro Sisniega, Wojciech Zbijewski, Hao Dang, J Webster Stayman, Michael Mow, Xiaohui Wang, David H Foos, Vassillis E Koliatsos, Nafi Aygun, Jeffrey H Siewerdsen
PURPOSE: A cone-beam CT scanner has been developed for detection and monitoring of traumatic brain injury and acute intracranial hemorrhage (ICH) at the point of care. This work presents a technical assessment of imaging performance and dose for the scanner in phantom and cadaver studies as a prerequisite to clinical translation. METHODS: The scanner incorporates a compact, rotating-anode x-ray source and a flat-panel detector (43 × 43 cm(2)) on a mobile U-arm gantry with source-axis distance = 550 mm and source-detector distance = 1000 mm...
October 2016: Medical Physics
Jae Geun Park, Ki Bae Kim, Joung Ho Han, Soon Man Yoon, Hee Bok Chae, Sei Jin Youn, Seon Mee Park
Background/Aims: EUS can detect bile duct stones (BDS) that are undetectable on multidetector computed tomography (MDCT). BDS associated with acute biliary pancreatitis (ABP) are small and tend to be excreted spontaneously. This study evaluated the usefulness of early EUS in patients with ABP and undetectable BDS on MDCT. Methods: Forty-one patients with ABP and undetectable BDS on MDCT underwent EUS within 24 hours of admission and were diagnosed with BDS, sludge, dilated common bile duct (CBD), or normal CBD...
October 25, 2016: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
Yoshinori Funama, Daisuke Utsunomiya, Seitaro Oda, Toshiaki Shimonobo, Takeshi Nakaura, Toshifumi Mukunoki, Masafumi Kidoh, Hideaki Yuki, Yasuyuki Yamashita
PURPOSE: Transluminal-attenuation-gradient (TAG) may reflect patient characteristics and physiological parameters. Furthermore, TAG may be affected by factors such as the CT scanner speed, scanning method, scan timing after contrast-medium (CM) injection, and the injection methods. The purpose of our study was to investigate quantitative TAG at different scan timing points after CM injection for coronary CT angiography. MATERIALS AND METHODS: Using a CM flow phantom and two types of connecting tube mimicking 0% and 70% coronary artery stenosis, we performed 320-detector volume scanning...
October 22, 2016: Physica Medica: PM
Sayumi Inoue, Misao Kawara, Takashi Iida, Masatoshi Iwasaki, Osamu Komiyama, Takashi Kaneda
PURPOSE: The aim of this study was to investigate the correlation between bone density of the edentulous mandibular ridge crest and residual bone height in edentulous subjects using multidetector computed tomography (MDCT) images. METHODS: A total of 194 bilateral MDCT images from 97 individuals with an edentulous mandible were selected for analysis. The residual ridge ratio (RRR), the CT values at the residual ridge crest, and the CT values at the lowest point of the mandible measured from MDCT images at molar region...
October 21, 2016: Journal of Prosthodontic Research
Maxim Avanesov, Julius M Weinrich, Thomas Kraus, Thorsten Derlin, Gerhard Adam, Jin Yamamura, Murat Karul
OBJECTIVES: The purpose of the retrospective study was to evaluate the additional value of dual-phase multidetector computed tomography (MDCT) protocols over a single-phase protocol on initial MDCT in patients with acute pancreatitis using three CT-based pancreatitis severity scores with regard to radiation dose. METHODS: In this retrospective, IRB approved study MDCT was performed in 102 consecutive patients (73 males; 55years, IQR48-64) with acute pancreatitis...
November 2016: European Journal of Radiology
Qihong Ni, Haolu Wang, Yunhe Zhang, Lijun Qian, Jiachang Chi, Xiaowen Liang, Tao Chen, Jian Wang
PURPOSE: The purpose of this study is to investigate the value of multidetector computed tomography (MDCT) assessment of resectability in hilar cholangiocarcinoma, and to identify the factors associated with unresectability and accurate evaluation of resectability. METHODS: From January 2007 to June 2015, a total of 77 consecutive patients were included. All patients had preoperative MDCT (with MPR and MinIP) and surgical treatment, and were pathologically proven with hilar cholangiocarcinoma...
October 21, 2016: Abdominal Radiology
Francesco Giganti, Alessandro Ambrosi, Maria Chiara Petrone, Carla Canevari, Damiano Chiari, Annalaura Salerno, Paolo Giorgio Arcidiacono, Roberto Nicoletti, Luca Albarello, Elena Mazza, Francesca Gallivanone, Luigi Gianolli, Elena Orsenigo, Antonio Esposito, Carlo Staudacher, Alessandro Del Maschio, Francesco De Cobelli
OBJECTIVES: To compare the diagnostic performance of Magnetic Resonance (MR) and diffusion-weighted imaging (DWI), Multidetector Computed Tomography (MDCT), Endoscopic Ultrasonography (EUS) and (18)F-FDG (Fluorodeoxyglucose) Positron Emission Tomography - Computed Tomography (PET-CT) in the preoperative loco-regional staging of oesophageal cancer. METHODS: Eighteen patients with oesophageal or Siewert I tumour (9 directly treated with surgery and 9 addressed to chemo/radiotherapy before) underwent 1...
October 21, 2016: British Journal of Radiology
Veysel Burulday, Mehmet Hüseyin Akgül, Nuray Bayar Muluk, Mehmet Faik Ozveren, Ahmet Kaya
In the present study, we investigated the types and ratio of posterior clinoid process (PCP) pneumatization in paranasal sinus multidetector computed tomography (MDCT). Paranasal MDCT images of 541 subjects (227 males, 314 females), between 15 and 65 years old, were included into the study. Pneumatization of anterior clinoid process and pneumatization types (I, II, or III) were evaluated in the males and females. PCP pneumatization was detected in 20.7 % of the males and 11.5 % of the females. Right, left, and bilateral PCP pneumatizations were detected in 7...
October 21, 2016: Neurosurgical Review
Andrew Scrima, Meghan G Lubner, Scott King, Gregory Kennedy, Perry J Pickhardt
OBJECTIVE: To compare performance of junior (JR)/senior (SR) abdominal radiologists using multidetector computed tomography (MDCT) to predict surgical intervention, bowel resection, and presence of bowel ischemia in patients with suspected small-bowel obstruction (SBO). METHODS: Retrospective, institutional review board-approved, Health Insurance Portability and Accountability Act-compliant, blinded, independent review of MDCT studies for suspected SBO in 179 adults (mean age, 55...
October 18, 2016: Journal of Computer Assisted Tomography
Rohit Bhoil, Shikha Sood, Sabina Bhoil, Anshul Chamail, R G Sood
Left coronary artery compression syndrome is an uncommon entity and characterized by compression of the LMCA in-between the aorta and an enlarged main pulmonary arterial trunk. It is usually associated with a congenital cardiac defect. Cardiac 64-slice MDCT provides a non-invasive and an accurate method for assessing the degree of dynamic LMCA compression throughout the cardiac cycle, its angulation relative to the left sinus of Valsalva and depiction of pulmonary pathology, making it a valuable tool in the workup of patients suspected of left coronary artery compression...
October 18, 2016: Acute Cardiac Care
Toshihiro Shoji, Sho Okada, Yuji Ohno, Atsushi Nakagomi, Yoshihide Fujimoto, Yosihio Kobayashi
OBJECTIVE: Pulse wave velocity is a non-invasive method that is useful not only for estimating arterial stiffness but also screening cardiovascular events in the general population. Upstroke time (UT) and % mean artery pressure (% MAP) are novel, adjunctive indices for arterial stiffness that are derived from morphology analysis of the pulse wave during brachial-ankle pulse wave velocity (baPWV) measurement. Several studies have shown the association between UT and coronary artery calcification score as assessed by multi-detector computed tomography (MDCT)...
September 2016: Journal of Hypertension
Sang Min Park, Haemin Jeong, Kyung-Soon Hong, Christopher Kim
BACKGROUND: In a patient underwent aortic valve replacement (AVR) due to bicuspid aortic valve (BAV) insufficiency without marked dilation of ascending aorta, the development of delayed-typed aneurysmal complication of ascending aorta has been often reported because the dilated aorta tends to grow insidiously with age. CASE SUMMARY: A 58-year-old man who underwent AVR with mechanical valve due to severe aortic regurgitation secondary to BAV 7 years previously presented with exertional chest discomfort for 1 year...
October 2016: Medicine (Baltimore)
Andreas Selberherr, Marcus Hörmann, Gerhard Prager, Philipp Riss, Christian Scheuba, Bruno Niederle
PURPOSE: The purpose of this study was to demonstrate the high number of kidney stones in primary hyperparathyroidism (PHPT) and the low number of in fact "asymptomatic" patients. METHODS: Forty patients with PHPT (28 female, 12 male; median age 58 (range 33-80) years; interquartile range 17 years [51-68]) without known symptoms of kidney stones prospectively underwent multidetector computed tomography (MDCT) and ultrasound (US) examinations of the urinary tract prior to parathyroid surgery...
October 12, 2016: Langenbeck's Archives of Surgery
Francisco Sánchez-Bueno, Rocío García-Pérez, María Antonia Claver Valderas, Jesús de la Peña Moral, Laura Frutos Esteban, Eduardo Ortiz Ruiz, Matilde Fuster Quiñonero, Pascual Parrilla Paricio
INTRODUCTION: In pancreatic ductal adenocarcinoma (PDA), surgical resection is the only curative treatment, but due to its late clinical presentation only 15-25% patients are candidates for curative resection. The aim of this prospective, single-center study is to determine the diagnostic utility of preoperative PET-CT for early detection of PDA and early panIN lesions. METHODS: We studied the histopathological features of PDA and different panIN lesions in 139 surgical samples from patients undergoing pancreatic resection (from 2010-2014), comparing these results with preoperative PET-CT and MDCT study...
October 3, 2016: Cirugía Española
Abdolmajid Taheri, Ayoob Rostamzadeh, Alireza Gharib, Daryoush Fatehi
INTRODUCTION: Recently, multidetector computed tomography (MDCT) has been introduced into clinical practice. MDCT has become the noninvasive diagnostic test of choice for detailed evaluation of biliary obstruction. AIM: the main objective of the present study was to evaluate the diagnostic value of MDCT compared to invasive procedures for detecting biliary obstruction causes. MATERIAL AND METHODS: Since February 2009 until May 2011 fifty biliary obstruction patients based on clinical, laboratory or ultrasonographic findings, were evaluated by Multidetector-row computed tomography...
July 16, 2016: Acta Informatica Medica: AIM
Yegyu Sung, Jung Sun Cho, Ho-Joong Youn
Multi-imaging modalities should be considered in patients with atrial septal defects (ASDs) in which the degree of right ventricular enlargement is not fully explained by the small size of ASD found on conventional transthoracic echocardiography. We report a case of crescent-shaped superior sinus venosus ASD discriminated using real-time three-dimensional transesophageal echocardiography. MDCT confirmed its relationship with the superior vena cava and the absence of combined anomalies, such as the pulmonary venous return anomaly...
October 4, 2016: Echocardiography
Marzanna Paczyńska, Piotr Sobieraj, Łukasz Burzyński, Maciej Kostrubiec, Małgorzata Wiśniewska, Piotr Bienias, Katarzyna Kurnicka, Barbara Lichodziejewska, Piotr Pruszczyk, Michał Ciurzyński
INTRODUCTION: Right ventricular dysfunction (RVD) is an indicator of poor prognosis in normotensive patients with acute pulmonary embolism (APE). The aim of this study was to compare right ventricular (RV)/left ventricular (LV) ratio measured by echocardiography and multidetector computed tomography (MDCT) with tricuspid annulus plane systolic excursion (TAPSE) as a prognostic factor of APE-related 30-day mortality. MATERIAL AND METHODS: We examined 76 patients with confirmed APE, hemodynamically stable at admission...
October 1, 2016: Archives of Medical Science: AMS
K Lehmann, D Eshmuminov, P Bauerfeind, C Gubler, P Veit-Haibach, A Weber, H Abdul-Rahman, M Fischer, C Reiner, P M Schneider
INTRODUCTION: The accuracy of preoperative lymph-node staging in patients with adenocarcinoma of the esophagogastric junction (AEG) or gastric cancer (GC) is low. The aim of this study was to assess the accuracy of [18F]fluorodeoxyglucose positron emission tomography/computed tomography (PET-CT) for lymph-node staging in patients with AEG or GC, with or without neoadjuvant treatment. PATIENTS AND METHODS: 221 consecutive patients with GC (n = 88) or AEG (n = 133) were evaluated...
September 7, 2016: European Journal of Surgical Oncology
Zhi-Long Wang, Xiao-Peng Zhang, Lei Tang, Xiao-Ting Li, Ying Wu, Ying-Shi Sun
The aim of this study was to retrospectively evaluate the ability of multidetector computed tomography (MDCT) oblique multiplanar reformation (MPR) for differentiating metastatic lymph nodes (LNs) in patients with gastric cancer.Seventy-nine patients with gastric cancer underwent preoperative computed tomography (CT). One-to-one correlation of LN was made between CT oblique multiplanar reformation and histopathologic slides. Long diameters, short diameters, and short-to-long axis ratios of LNs were evaluated to differentiate metastasis...
September 2016: Medicine (Baltimore)
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