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computed tomography perfusion

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https://www.readbyqxmd.com/read/28214497/incidence-of-pulmonary-embolism-in-patients-with-isolated-calf-deep-vein-thrombosis
#1
REVIEW
Alvin R Wu, Jonah Garry, Nicos Labropoulos
BACKGROUND: The severity of pulmonary embolism (PE) after isolated calf deep vein thrombosis (C-DVT) is controversial, which leads to inconsistent clinical decision making when treating C-DVT. This systematic review assessed PE frequency and severity in patients with C-DVT. METHODS: Database searches were completed using MEDLINE and Scopus along with cross-referencing. Two independent reviewers used using rigorous inclusion and exclusion criteria to screen the papers...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28210637/anomalous-origin-of-the-left-coronary-artery-from-the-pulmonary-artery-an-uncommon-coronary-anomaly-with-serious-implications-in-adulthood
#2
Venkat Gangadharan, Kamesh Sivagnanam, Ghulam Murtaza, Michael Ponders, Otto Teixeira, Timir Paul
A 36-year-old woman was seen with complaints of exertional chest pain and shortness of breath. Her medical history included atrial fibrillation and diabetes. Physical examination was unremarkable except for an irregular cardiac rhythm. Myocardial perfusion imaging revealed the presence of a large area of infarction involving the entire anterior and apical walls and part of the anteroseptal wall with minimal periinfarct ischemia. Computed tomography coronary angiogram revealed an anomalous left main coronary artery arising from the main pulmonary artery...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28205183/large-primary-pleural-synovial-sarcoma-with-severe-dyspnea-a-case-report
#3
Minoru Yamaki, Shuji Yonehara, Toshio Noriyuki
BACKGROUND: Synovial sarcoma is a malignant neoplasm of soft tissues. It occurs mainly in the extremities and is closely related to tendons, tendon sheaths, and bursal structures. Primary synovial sarcoma of the pleura and lungs is extremely rare. CASE PRESENTATION: We present the case of a 62-year-old man with a large synovial sarcoma of the left pleura. He presented with general fatigue and severe dyspnea. Chest computed tomography (CT) revealed a 20-cm tumor in the left thoracic cavity...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28205072/negative-predictive-value-of-stress-myocardial-perfusion-imaging-and-coronary-computed-tomography-angiography-a-meta-analysis
#4
Roberta Green, Valeria Cantoni, Mario Petretta, Wanda Acampa, Mariarosaria Panico, Pietro Buongiorno, Giorgio Punzo, Marco Salvatore, Alberto Cuocolo
BACKGROUND: Comparing the prognostic value of a negative finding by stress single-photon emission computed tomography myocardial perfusion imaging (MPI) and coronary computed tomography angiography (CCTA) may be useful to evaluate how better identify low-risk patients. We performed a meta-analysis to compare the long-term negative predictive value (NPV) of normal stress MPI and normal CCTA in subjects with suspected coronary artery disease (CAD). METHODS AND RESULTS: Studies published between January 2000 and November 2016 were identified by database search...
February 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28205000/aortic-knob-width-reflects-left-ventricular-diastolic-function-assessed-by-gated-myocardial-perfusion-single-photon-emission-computed-tomography-in-patients-with-normal-myocardial-perfusion
#5
Satoshi Kurisu, Tadanao Higaki, Yoji Sumimoto, Hiroki Ikenaga, Noriaki Watanabe, Ken Ishibashi, Yoshihiro Dohi, Yukihiro Fukuda, Yasuki Kihara
BACKGROUND: Aortic knob width on chest radiography represents the extent of aortic dialation and tortuosity of the aortic arch. We tested the hypothesis that aortic knob width reflected left ventricular (LV) diastolic function assessed by gated myocardial perfusion single photon emission computed tomography (SPECT) in patients with normal myocardial perfusion. METHODS: One hundred and thirty patients with preserved LV ejection fraction and normal myocardial perfusion were enrolled in this study...
February 15, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28203578/supersized-atheroma-causing-acquired-coarctation-of-aorta-leading-to-heart-failure
#6
Sajin Karakattu, Ghulam Murtaza, Sharma Dinesh, Kamesh Sivagnanam, Jeffrey Schoondyke, Timir Paul
Calcified atheromatous aortic lesion causing significant narrowing of the aorta is an uncommon clinical entity. This calcified atheroma leads to obstruction of the lumen of the aorta simulating acquired coarctation of aorta causing impaired perfusion of lower limbs, visceral ischemia, and hypertension. We report a case of 58-year-old patient who presented with dyspnea on exertion, orthopnea, paroxysmal nocturnal dyspnea, 25-lb weight gain, lower extremity edema, and chest pain. Extensive workup including computed tomography and magnetic resonance imaging revealed a large calcific mass in the aortic arch causing his presenting symptoms...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28202051/variability-of-radiation-doses-of-cardiac-diagnostic-imaging-tests-the-radio-evinci-study-radiationdose-subproject-of-the-evinci-study
#7
Clara Carpeggiani, Eugenio Picano, Marco Brambilla, Claudio Michelassi, Juhani Knuuti, Philipp Kauffman, S Richard Underwood, Danilo Neglia
BACKGROUND: Patients with coronary artery disease can accumulate significant radiation dose through repeated exposures to coronary computed tomographic angiography, myocardial perfusion imaging with single photon emission computed tomography or positron emission tomography, and to invasive coronary angiography. Aim of the study was to audit radiation doses of coronary computed tomographic angiography, single photon emission computed tomography, positron emission tomography and invasive coronary angiography in patients enrolled in the prospective, randomized, multi-centre European study-EVINCI (Evaluation of Integrated Cardiac Imaging for the Detection and Characterization of Ischemic Heart Disease)...
February 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28198536/prevalence-of-risk-factors-and-asymptomatic-carotid-atherosclerosis-in-diabetic-patients-screened-for-silent-myocardial-ischemia-by-spect-myocardial-imaging
#8
Irena Peovska Mitevska, Natalija Baneva, Marijan Bosevski, Elizabeta Srbinovska Kostovska
BACKGROUND: The aim of the study was to evaluate whether there is any association between myocardial ischemia, common risk factors and carotid artery ultrasound parameters in asymptomatic type 2 diabetic (DMT2) patients. MATERIAL AND METHODS: 60 asymptomatic DMT2 patients (pts) without known coronary artery disease (CAD) underwent one day rest Dypiridamole stress Tc-99m sestamibi single photon emission computed tomography myocardial perfusion scintigraphy (MPS)...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28197975/research-of-predictive-factors-for-cardiac-resynchronization-therapy-a-prospective-study-comparing-data-from-phase-analysis-of-gated-myocardial-perfusion-single-photon-computed-tomography-and-echocardiography-trying-to-anticipate-response-to-crt
#9
Rémy Gendre, O Lairez, P Mondoly, A Duparc, D Carrié, M Galinier, I Berry, T Cognet
BACKGROUND: Cardiac resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure. About 20% of implanted patients are considered as "non-responders". This study aimed to evaluate gated myocardial perfusion single-photon emission computed tomography (GMPS) phase parameters as compared to echocardiography in the assessment of predictors for response to CRT before and after CRT activation. METHODS: Forty-two patients were prospectively included during 15 months...
February 14, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28197219/factors-determining-altered-perfusion-after-acute-pulmonary-embolism-assessed-by-quantified-single-photon-emission-computed-tomography-perfusion-scan
#10
Marc Meysman, Hendrik Everaert, Walter Vincken
AIM OF THE STUDY: The aim of the study was to analyze the evolution of perfusion (Q)-defects in patients treated for acute pulmonary embolism (PE), correlation with baseline parameters and evaluation of recurrence risk. METHODS: This is a single-center prospective observational cohort study in symptomatic normotensive PE. Comparison of the ventilation/perfusion single-photon emission computed tomography (V/Q-SPECT) acquired at baseline with a quantified SPECT (Q-SPECT) repeated at 1 week and 6 months...
January 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/28190492/regional-cerebral-blood-flow-assessed-by-single-photon-emission-computed-tomography-spect-in-dogs-with-congenital-portosystemic-shunt-and-hepatic-encephalopathy
#11
Matan Or, Kathelijne Peremans, Valentine Martlé, Eva Vandermeulen, Tim Bosmans, Nausikaa Devriendt, Hilde de Rooster
Regional cerebral blood flow (rCBF) in eight dogs with congenital portosystemic shunt (PSS) and hepatic encephalopathy (HE) was compared with rCBF in eight healthy control dogs using single photon emission computed tomography (SPECT) with a (99m)technetium-hexamethylpropylene amine oxime ((99m)Tc-HMPAO) tracer. SPECT scans were abnormal in all PSS dogs. Compared to the control group, rCBF in PSS dogs was significantly decreased in the temporal lobes and increased in the subcortical (thalamic and striatal) area...
February 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28188475/myocardial-perfusion-imaging-with-pet
#12
Roel S Driessen, Pieter G Raijmakers, Wijnand J Stuijfzand, Paul Knaapen
Noninvasive assessment of coronary artery disease remains a challenging task, with a large armamentarium of diagnostic modalities. Myocardial perfusion imaging (MPI) is widely used for this purpose whereby cardiac positron emission tomography (PET) is considered the gold standard. Next to relative radiotracer distribution, PET allows for measurement of absolute myocardial blood flow. This quantification of perfusion improves diagnostic accuracy and prognostic value. Cardiac hybrid imaging relies on the fusion of anatomical and functional imaging using coronary computed tomography angiography and MPI, respectively, and provides incremental value as compared with either stand-alone modality...
February 10, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28185782/acute-pulmonary-embolism-detection-with-ventilation-perfusion-spect-combined-with-full-dose-ct-what-is-the-best-option
#13
M Milà, J Bechini, A Vázquez, V Vallejos, M Tenesa, A Espinal, M Fraile, M Monreal
AIM: To compare diagnostic accuracy of Ventilation/Perfusion (V/P) single-photon emission computed tomography (SPECT) combined with simultaneous full-dose CT with a hybrid SPECT/CT scanner versus planar ventilation/perfusion (V/P) SPECT and CT angiography (CTA) in patients suspected with acute pulmonary embolism (PE). METHODS: Between 2009 and 2011, consecutive patients suspected of acute PE were referred for V/P SPECT/CT (reviewed board approved study). A contrast agent was administered to patients who had no contraindications...
February 6, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28183285/early-detection-of-myocardial-infarction-following-blunt-chest-trauma-by-computed-tomography-a-case-report
#14
Thung-Lip Lee, Chin-Feng Hsuan, Chen-Hsiang Shih, Huai-Wen Liang, Hsing-Shan Tsai, Wei-Kung Tseng, Kwan-Lih Hsu
BACKGROUND: Blunt cardiac trauma encompasses a wide range of clinical entities, including myocardial contusion, cardiac rupture, valve avulsion, pericardial injuries, arrhythmia, and even myocardial infarction. Acute myocardial infarction due to coronary artery dissection after blunt chest trauma is rare and may be life threatening. Differential diagnosis of acute myocardial infarction from cardiac contusion at this setting is not easy. CASE PRESENTATION: Here we demonstrated a case of blunt chest trauma, with computed tomography detected myocardium enhancement defect early at emergency department...
February 10, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28182709/320-row-ct-renal-perfusion-imaging-in-patients-with-aortic-dissection-a-preliminary-study
#15
Dongting Liu, Jiayi Liu, Zhaoying Wen, Yu Li, Zhonghua Sun, Qin Xu, Zhanming Fan
OBJECTIVE: To investigate the clinical value of renal perfusion imaging in patients with aortic dissection (AD) using 320-row computed tomography (CT), and to determine the relationship between renal CT perfusion imaging and various factors of aortic dissection. METHODS: Forty-three patients with AD who underwent 320-row CT renal perfusion before operation were prospectively enrolled in this study. Diagnosis of AD was confirmed by transthoracic echocardiography...
2017: PloS One
https://www.readbyqxmd.com/read/28181172/discrepant-imaging-findings-of-portal-vein-thrombosis-with-dynamic-computed-tomography-and-computed-tomography-during-arterial-portography-in-hepatocellular-carcinoma-possible-cause-leading-to-inappropriate-treatment-selection
#16
Hidenori Toyoda, Takashi Kumada, Toshifumi Tada, Kazuyuki Mizuno, Natsuko Kobayashi, Yosuke Inukai, Akira Takeda, Yasuhiro Sone
We encountered a patient with hepatocellular carcinoma who had discrepant imaging findings on portal vein thrombosis with portal phase dynamic computed tomography (CT) and CT during arterial portography (CTAP). CTAP, via the superior mesenteric artery and via the splenic artery, both showed a portal perfusion defect in the right hepatic lobe, indicating portal vein thrombosis in the main trunk of the right portal vein. Portal phase dynamic CT clearly depicted portal perfusion of the same hepatic area. Transarterial chemoembolization was successfully performed, but it was associated with severe liver injury...
February 8, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28169509/nonalcoholic-fatty-liver-disease-and-measures-of-early-brain-health-in-middle-aged-adults-the-cardia-study
#17
Lisa B VanWagner, James G Terry, Lisa S Chow, Amy C Alman, Hakmook Kang, Katherine H Ingram, Christina Shay, Cora E Lewis, R Nick Bryan, Lenore J Launer, J Jeffrey Carr
OBJECTIVE: To assess associations between nonalcoholic fatty liver disease (NAFLD) and measures of brain health in a population-based sample of adults. METHODS: Participants from the CARDIA study (Y25 exam; age 43-55 years) with concurrent computed tomography quantification of liver fat, visceral adipose tissue (VAT), and brain magnetic resonance (MR) images were included (n = 505). NAFLD was identified after exclusion of other causes of liver fat. Total tissue volume (TTV) and gray matter cerebral blood flow (GM-CBF) were estimated using 3T brain MR images...
February 7, 2017: Obesity
https://www.readbyqxmd.com/read/28169309/correlative-imaging-of-the-murine-hind-limb-vasculature-and-muscle-tissue-by-microct-and-light-microscopy
#18
Laura Schaad, Ruslan Hlushchuk, Sébastien Barré, Roberto Gianni-Barrera, David Haberthür, Andrea Banfi, Valentin Djonov
A detailed vascular visualization and adequate quantification is essential for the proper assessment of novel angiomodulating strategies. Here, we introduce an ex vivo micro-computed tomography (microCT)-based imaging approach for the 3D visualization of the entire vasculature down to the capillary level and rapid estimation of the vascular volume and vessel size distribution. After perfusion with μAngiofil®, a novel polymerizing contrast agent, low- and high-resolution scans (voxel side length: 2.58-0.66 μm) of the entire vasculature were acquired...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28165859/exercise-induced-hypoxemia-in-juvenile-thyroid-carcinoma-with-lung-metastases
#19
Florian J Segerer, Johannes Biko, Christoph Reiners, Clemens Wirth, Helge Hebestreit
PURPOSE: Exercise-induced arterial hypoxemia (EIAH) has been reported in patients with juvenile thyroid cancer treated with radioiodine for lung metastases. This retrospective study tested the hypothesis that EIAH is due to ventilation-perfusion-mismatch in this rare pulmonary condition. METHOD: 50 patients (age 13 -23 years) treated for juvenile thyroid carcinoma and lung metastasis with 131I and 24 controls with thyroid cancer but without lung metastases and prior 131I-treatment were assessed in a state of acute hypothyroidism by computed tomography of the lungs, pulmonary function testing, cardiopulmonary exercise test with measurements of gas exchange, oxygen saturation, alveolar-arterial difference in pO2 (p(A-a)O2) and pCO2 (p(ET-a)CO2)...
February 6, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28161808/does-applying-resolution-recovery-to-normal-databases-confer-an-advantage-over-conventional-3d-stereotactic-surface-projection-techniques
#20
Nobuhiro Yada, Hideo Onishi, Masahiro Miyai, Kentarou Ozasa, Takashi Katsube, Keiichi Onoda, Masuo Haramoto, Yasushi Yamamoto, Shuhei Yamaguchi, Hajime Kitagaki
We evaluated a novel normal database (NDB) generated using single photon emission computed tomography (SPECT) data obtained from healthy brains by using a SPECT/CT system, analyzed using a resolution recovery (RR) technique applied to the three-dimensional stereotactic surface projection (3D-SSP) technique. We used a three-dimensional ordered subset expectation maximization method (3D-OSEM) with applied scatter correction (SC), attenuation correction, and RR to reconstruct the data. We verified the accuracy of the novel NDB's values (Z, extent, and error scores), and compared the novel NDB to the 3D-SSP technique by using simulated misery perfusion-related patient data from a conventional NDB...
February 4, 2017: Radiological Physics and Technology
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