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MDCT angiography

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https://www.readbyqxmd.com/read/27894580/imaging-studies-for-preoperative-planning-of-perforator-flaps-an-overview
#1
REVIEW
Shimpei Ono, Hiromitsu Hayashi, Hiroyuki Ohi, Rei Ogawa
The vascular anatomy of perforators varies between individuals; thus, accurate preoperative assessment of perforators is essential for safely planning perforator flaps. Perforator computed tomographic angiography (P-CTA) with multidetector-row computed tomography (MDCT) is one of the best available methods to precisely reveal the 3-dimensional anatomic details of perforators. The aim of this report is to describe the authors' experience using P-CTA with MDCT for detecting the perforating vessel preoperatively and a step-by-step approach to harvest perforator flaps based on this technique...
January 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/27891547/severe-pelvic-injury-vascular-lesions-detected-by-ante-and-post-mortem-contrast-medium-enhanced-ct-and-associations-with-pelvic-fractures
#2
Mahmoud Hussami, Silke Grabherr, Reto A Meuli, Sabine Schmidt
OBJECTIVES: The objectives of this study were to compare arterial and venous contrast medium extravasation in severe pelvic injury detected by ante- and post-mortem multi-detector CT (MDCT) and determine whether vascular injury is associated with certain types of pelvic fracture. METHODS: We retrospectively included two different cohorts of blunt pelvic trauma with contrast medium extravasation shown by MDCT. The first group comprised 49 polytrauma patients; the second included 45 dead bodies undergoing multi-phase post-mortem CT-angiography (MPMCTA)...
November 28, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27882733/anomalous-origin-of-the-right-coronary-artery-first-familial-cases-in-asia
#3
Hideki Motomura, Mari Yokokawa, Hirofumi Fukunaga, Mari Nakagaki, Tomoyuki Hasuwa, Hiroyuki Moriuchi
Congenital coronary artery abnormalities may cause sudden death, particularly in athletes. Two siblings, aged 10 and 9 years, respectively, were diagnosed with anomalous origin of the right coronary artery on multi-detector computed tomography (MDCT). The right coronary artery arose from the left coronary cusp, and was wedged between the aorta and pulmonary artery. This was also noted on cardiac ultrasonography (UCG), but in general this might not be seen on electrocardiography at rest. Although the surgical indications are unclear in the case of unproven ischemia, early recognition of the condition may reduce risk of the cardiac events during exercise...
November 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/27865676/bailout-intravenous-esmolol-for-heart-rate-control-in-cardiac-computed-tomography-angiography
#4
Sílvia Aguiar Rosa, Ruben Ramos, Hugo Marques, Rosana Santos, Cecília Leal, Helena Casado, Márcia Saraiva, Luísa Figueiredo, Rui Cruz Ferreira
OBJECTIVE: To evaluate the efficacy and safety of a heart rate (HR) reduction protocol using intravenous esmolol as bailout for failed oral metoprolol regimens in patients undergoing coronary computed tomography angiography (CCTA) with 64-slice multidetector computed tomography (64-MDCT). METHODS: Patients who underwent cardiac 64-MDCT in a single institution between 2011 and 2014 were analyzed. Those with HR above 60 beats per minute (bpm) on presentation received oral metoprolol (50-200 mg) at least one hour before CCTA...
December 2016: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/27806106/voxel-based-sensitivity-of-flat-panel-ct-for-the-detection-of-intracranial-hemorrhage-comparison-to-multi-detector-ct
#5
Andreas M Frölich, Jan-Hendrik Buhk, Jens Fiehler, Andre Kemmling
OBJECTIVES: Flat-panel CT (FPCT) allows cross-sectional parenchymal, vascular and perfusion imaging within the angiography suite, which could greatly facilitate acute stroke management. We hypothesized that FPCT offers equal diagnostic accuracy compared to multi-detector CT (MDCT) as a primary tool to exclude intracranial hemorrhage. METHODS: 22 patients with intracranial hematomas who had both MDCT and FPCT performed within 24 hours were retrospectively identified...
2016: PloS One
https://www.readbyqxmd.com/read/27805446/assessment-of-left-ventricular-volume-and-function-in-healthy-dogs-by-use-of-one-two-and-three-dimensional-echocardiography-versus-multidetector-computed-tomography
#6
Katherine F Scollan, Susanne M Stieger-Vanegas, D David Sisson
OBJECTIVE To compare left ventricle (LV) volume and function variables obtained by use of 1-D, 2-D, and real-time 3-D echocardiography versus ECG-gated multidetector row CT (MDCT) angiography, which was considered the criterion-referenced standard. ANIMALS 6 healthy, purpose-bred dogs. PROCEDURES Dogs were anesthetized and administered a constant rate infusion of esmolol, and 1-D, 2-D, and 3-D echocardiography and ECG-gated, contrast-enhanced MDCT were performed. End-diastolic volume (EDV), end-systolic volume (ESV), stroke volume, and ejection fraction (EF) were calculated by use of the Teichholz method for 1-D echocardiography, single-plane and biplane modified Simpson method of disks (MOD) and area-length method for 2-D echocardiography, and real-time biplane echocardiography (RTBPE) and real-time 3-D echocardiography (RT3DE) for 3-D echocardiography...
November 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27801658/radiation-exposure-and-contrast-agent-reduction-during-transcatheter-aortic-valve-implantation-an-ongoing-experience
#7
Davide Maccagni, Cosmo Godino, Azeem Latib, Morena Mancin, Alaide Chieffo, Alberto Margonato, Antonio Colombo
OBJECTIVES: To determine the patient radiation exposure and contrast agent variation during transcatheter aortic valve implantation (TAVI) procedures resulting from technological improvements. METHODS: TAVI procedures from January 2008 to July 2015 were analyzed in three different time periods: 1st period, when the angiography was equipped with an image intensifier technology; 2nd period, starting with the installation of a new angiography system with flat-panel detector (FPD) technology; and 3rd period, starting with the systematic use of preprocedural multidetector computed tomography (MDCT) to individualize optimal fluoroscopic projections for the aortic prosthesis implantation...
November 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27798447/prediction-of-vascular-invasion-using-a-3-point-scale-computed-tomography-grading-system-in-pancreatic-ductal-adenocarcinoma-correlation-with-surgery
#8
Lei Zhang, Zhui-Yang Zhang, Jian-Ming Ni, Bin Li, Fang-Ming Chen, Chun-Juan Jiang, Chun-Hong Hu
OBJECTIVE: The aim of this study was to evaluate the correlation between a 3-point scale multidetector computed tomography (MDCT) grading system and surgical exploration in predicting vascular invasion and resectability in patients with pancreatic ductal adenocarcinoma (PDA). METHODS: Fifty-five patients with surgical and pathologic confirmation of PDA were retrospectively analyzed by 3 radiologists independently. All patients had MDCT examination with multiplanar reformatted images, computed tomography (CT) angiography, and negative-contrast CT cholangiopancreatography (nCTCP)...
October 29, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27796494/the-oblique-occipital-sinus-anatomical-study-using-bone-subtraction-3d-ct-venography
#9
Hwa Seon Shin, Dae Seob Choi, Hye Jin Baek, Ho Cheol Choi, Hye Young Choi, Mi Jung Park, Ji Eun Kim, Jeong Yeol Han, SungEun Park
BACKGROUND AND PURPOSE: An occipital sinus draining into the sigmoid sinus has been termed the oblique occipital sinus (OOS). The frequency, anatomical features, patterns, and relationship with the transverse sinus of the oblique occipital sinus were analyzed in this study. MATERIALS AND METHODS: The study included 1805 patients who underwent brain CT angiography during a 3-year period from 2013 to 2015. CT examinations were performed using a 64-slice MDCT system...
October 31, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27780673/transluminal-attenuation-gradient-coronary-ct-angiography-on-a-320-mdct-volume-scanner-effect-of-scan-timing-coronary-artery-stenosis-and-cardiac-output-using-a-contrast-medium-flow-phantom
#10
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...
November 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27754037/os-13-03-high-upstroke-time-of-arterial-pulse-wave-is-an-independent-predictor-for-the-presence-of-coronary-artery-disease
#11
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
https://www.readbyqxmd.com/read/27684852/preoperative-evaluation-value-of-aortic-arch-lesions-by-multidetector-computed-tomography-angiography-in-type-a-aortic-dissection
#12
Fang Huang, Qiang Chen, Qing-Quan Lai, Wen-Han Huang, Hong Wu, Wei-Cheng Li
The purpose of this study was to preoperatively evaluate the value of aortic arch lesions by multidetector computed tomography (MDCT) angiography in type A aortic dissection (AD).From January 2013 to December 2015, we enrolled 42 patients with type A AD who underwent MDCT angiography in our hospital. The institutional database of patients was retrospectively reviewed to identify MDCT angiography examinations for type A AD. Surgical corrections were conducted in all patients to confirm diagnostic accuracy.In this study, the diagnostic accuracy of MDCT angiography was 100% in all 42 patients...
September 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27642955/os-13-03-high-upstroke-time-of-arterial-pulse-wave-is-an-independent-predictor-for-the-presence-of-coronary-artery-disease
#13
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
https://www.readbyqxmd.com/read/27616153/role-of-mdct-in-the-detection-of-early-abdominal-complications-after-orthotopic-liver-transplantation
#14
Piero Boraschi, Francescamaria Donati, Massimiliano Rossi, Davide Ghinolfi, Franco Filipponi, Fabio Falaschi
PURPOSE: This study aims to assess the role of multidetector computed tomography (MDCT) for detecting early abdominal complications after orthotopic liver transplantation. MATERIALS AND METHODS: We retrospectively enrolled 170 subjects with clinical laboratory and/or echo-color Doppler abnormalities who underwent MDCT within the first 90 days after transplantation. All images were reviewed by two radiologists in conference and imaging results were correlated with digital subtraction angiography, conventional cholangiography, surgery, clinical laboratory, and/or imaging follow-up...
August 26, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/27573129/unenhanced-3d-turbo-spin-echo-mr-angiography-of-lower-extremity-arteries-comparison-with-128-mdct-angiography
#15
Hakan Demirtaş, Tuna Parpar, Bumin Değirmenci, Mustafa Kara, Ahmet Orhan Çelik, Ayşe Umul, Mustafa Kayan, Ömer Yılmaz
PURPOSE: This study aimed to investigate the feasibility and diagnostic power of unenhanced 3D turbo spin echo MR angiography sequence (a technique based on subtraction of corresponding images acquired in diastole and systole, Syngo Native Space-Siemens healthcare) to identify peripheral artery disease (PAD). MATERIALS AND METHODS: Thirty patients (619 arterial segments in total) suspected with PAD and who were assessed with lower extremity MDCT angiography were examined starting from the level of aortic bifurcation for both lower extremities by 3D native space MR angiography...
August 29, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27567749/ectopic-insertion-of-a-duplicated-ureter-into%C3%A2-prostatic-urethra-demonstration-by%C3%A2-3d%C3%A2-multi-detector-computed-tomography-urography
#16
Jun Deng, Xiongbing Lu, Ying Liu
Ectopic insertion of the ureter in the genitourinary tract is a rare congenital disorder, usually associated with ureteral duplication. Identification of the insertion open is critical for ureteric re-implantation. However, the challenge in the diagnosis of ectopic insertion of the ureter usually is to identify its insertion, particularly when the affected ureter is not dilated. Multi-detector computed tomography (MDCT) urography with nonionic iodinated contrast media delineates the ureteric course in the normal functioning kidney in the excretory phase [1]...
October 6, 2016: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/27560288/median-arcuate-ligament-syndrome-predictor-of-ischemic-complications
#17
Agata Arazińska, Michał Polguj, Andrzej Wojciechowski, Łukasz Trębiński, Ludomir Stefańczyk
Median arcuate ligament syndrome (MALS) is a pathologic entity that can affect the celiac axis. Due to the extensive collateral network of mesenteric circulation, stenosis of one mesenteric artery does not lead to significant symptoms. The purpose of this study was to describe multidetector computed tomography (MDCT) angiography findings of celiac artery entrapment by the median arcuate ligament and determine those patients with high risks of ischemic complications. From January 2012 to March 2016, 103 patients with celiac artery (CA) compression by median arcuate ligament were detected...
November 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27539731/optimisation-of-coronary-vascular-territorial-3d-echocardiographic-strain-imaging-using-computed-tomography-a-feasibility-study-using-image-fusion
#18
Martina Chantal de Knegt, A Fuchs, P Weeke, R Møgelvang, C Hassager, K F Kofoed
Current echocardiographic assessments of coronary vascular territories use the 17-segment model and are based on general assumptions of coronary vascular distribution. Fusion of 3D echocardiography (3DE) with multidetector computed tomography (MDCT) derived coronary anatomy may provide a more accurate assessment of left ventricular (LV) territorial function. We aimed to test the feasibility of MDCT and 3DE fusion and to compare territorial longitudinal strain (LS) using the 17-segment model and a MDCT-guided vascular model...
August 18, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27502596/the-development-of-an-automatically-produced-cholangiography-procedure-using-the-reconstruction-of-portal-phase-multidetector-row-computed-tomography-images-preliminary-experience
#19
Tomoaki Hirose, Tsuyoshi Igami, Kusuto Koga, Yuichiro Hayashi, Tomoki Ebata, Yukihiro Yokoyama, Gen Sugawara, Takashi Mizuno, Junpei Yamaguchi, Kensaku Mori, Masato Nagino
PURPOSE: Fusion angiography using reconstructed multidetector-row computed tomography (MDCT) images, and cholangiography using reconstructed images from MDCT with a cholangiographic agent include an anatomical gap due to the different periods of MDCT scanning. To conquer such gaps, we attempted to develop a cholangiography procedure that automatically reconstructs a cholangiogram from portal-phase MDCT images. METHODS: The automatically produced cholangiography procedure utilized an original software program that was developed by the Graduate School of Information Science, Nagoya University...
August 8, 2016: Surgery Today
https://www.readbyqxmd.com/read/27453646/evaluation-of-renal-vascular-anatomy-in-live-renal-donors-role-of-multi-detector-computed-tomography
#20
Vaidehi Kumudchandra Pandya, Alpeshkumar Shakerlal Patel, Harsh Chandrakant Sutariya, Shruti Pradipkumar Gandhi
BACKGROUND: Evaluation of renal vascular variations is important in renal donors to avoid vascular complications during surgery. Venous variations, mainly resulting from the errors of the embryological development, are frequently observed. AIM: This retrospective cross-sectional study aimed to investigate the renal vascular variants with multidetector computed tomography (MDCT) angiography to provide valuable information for surgery and its correlations with surgical findings...
July 2016: Urology Annals
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