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computed tomography perfusion

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https://www.readbyqxmd.com/read/28105165/the-value-of-64-slice-spiral-ct-perfusion-imaging-in-the-treatment-of-liver-cancer-with-argon-helium-cryoablation
#1
Yinggang Lv, Yurong Jin, Qiaohuan Yan, Dingling Yuan, Yanling Wang, Xianping Li, Yanfeng Shen
We analyzed the effectiveness of using 64-slice spiral computed tomography (CT) and perfusion imaging to guide argon-helium cryoablation treatment of liver cancer. In total, 60 cases of advanced hepatocellular carcinoma before surgery treated with argon-helium cryoablation were inlcuded in the present study. Retrospective summary of the 60 cases of metaphase and advanced liver cancer were used as the control group. The control group were treated using cryoablation with argon-helium knife. We used enhanced scanning with 64-slice spiral CT to define the extent of their lesions and prepared a plan of percutaneous cryoablation for the treatment...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28102961/assessing-the-use-of-4dct-ventilation-in-pre-operative-surgical-lung-cancer-evaluation
#2
Yevgeniy Vinogradskiy, Matthew Jackson, Leah Schubert, Bernard Jones, Richard Castillo, Edward Castillo, Thomas Guerrero, John Mitchell, Chad Rusthoven, Moyed Miften, Brian Kavanagh
PURPOSE: A primary treatment option for lung cancer patients is surgical resection. Patients who have poor lung function prior to surgery are at increased risk of developing serious and life-threatening complications after surgical resection. Surgeons use nuclear medicine ventilation-perfusion (VQ) scans along with pulmonary function test (PFT) information to assess a patient's pre-surgical lung function. The nuclear medicine images and pre-surgery PFTs are used to calculate percent predicted postoperative (%PPO) PFT values by estimating the amount of functioning lung tissue that would be lost with surgical resection...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28101162/correlation-between-high-perfusion-syndrome-and-stent-restenosis-after-stent-implantation
#3
Yingyi Li, Lingtao Tang, Dong Qi, Chunlei Wang, Suxia Zhang, Pengfei Hu, Yun Wang, Bogang Zhang, Kunxi Zhang
The present study was conducted to determine the correlation between high perfusion syndrome and stent restenosis after cerebral vascular stent implantation. A total of 146 patients diagnosed with cerebral vascular stenosis and stent implantation were selected. A total of 55 cases (37.67%) of cerebral hyperperfusion syndrome patients were diagnosed by xenon-enhanced computer tomography (Xe-CT) examination and clinical symptoms within 3 days after surgery and were chosen as the observation group. A total of 91 cases were selected as the control group...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28099329/evaluation-of-efficacy-of-transcatheter-arterial-chemoembolization-combined-with-computed-tomography-guided-radiofrequency-ablation-for-hepatocellular-carcinoma-using-magnetic-resonance-diffusion-weighted-imaging-and-computed-tomography-perfusion-imaging-a
#4
Guo-Liang Shao, Jia-Ping Zheng, Li-Wen Guo, Yu-Tang Chen, Hui Zeng, Zheng Yao
BACKGROUND: The purpose of this study is to evaluate the efficacy of transcatheter arterial chemoembolization (TACE) combined with computed tomography-guided radiofrequency ablation (CT-RFA) in the treatment of hepatocellular carcinoma (HCC) using magnetic resonance diffusion weighted imaging (MR-DWI) and CT perfusion imaging (CT-PI). METHODS: From January 2008 to January 2014, a total of 522 HCC patients receiving TACE combined with CT-RFA were included in this study...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28091969/quality-of-life-as-predictor-for-the-development-of-cardiac-ischemia-in-high-risk-asymptomatic-diabetic-patients
#5
Philip Haaf, Myriam Ritter, Leticia Grize, Matthias E Pfisterer, Michael J Zellweger
BACKGROUND: Ischemia induced by psychological stress and depression is a common phenomenon in stable coronary artery disease (CAD). We evaluated the quality of life (QoL) of diabetic patients screened for CAD and assessed the prognostic value of mental and physical QoL scores to predict the development of new cardiac ischemia. METHODS: Prospective multicentre outcome study. The study comprised 400 asymptomatic diabetic patients without history or symptoms of CAD...
January 13, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28089233/epicardial-adipose-tissue-and-myocardial-ischemia-assessed-by-computed-tomography-perfusion-imaging-and-invasive-fractional-flow-reserve
#6
Rahul G Muthalaly, Nitesh Nerlekar, Dennis T L Wong, James D Cameron, Sujith K Seneviratne, Brian S Ko
BACKGROUND: Epicardial adipose tissue (EAT) is a metabolically active fat depot that is associated with incident coronary artery disease (CAD) and major adverse cardiovascular events. The relationship between EAT and myocardial ischemia remains unclear. This study investigated the relationship between EAT volume and the presence of perfusion defects on myocardial computed tomographic perfusion imaging (CTP) and functional stenoses on invasive fractional flow-reserve (FFR). METHODS: Data were obtained from a previous prospective cross-sectional study in patients with suspected CAD...
December 30, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28079797/case-report-rapid-improvement-of-crossed-cerebellar-diaschisis-after-intravascular-laser-irradiation-of-blood-in-a-case-of-stroke
#7
Wan-Hua Yang, Shiou-Ping Lin, Shin-Tsu Chang
RATIONALE: Crossed cerebellar diaschisis (CCD) is a poor prognostic factor after stroke because without immediate cerebral reperfusion no further improvements in the patient's condition can be achieved. We investigated the clinical effects of intravascular laser irradiation therapy (ILIB) on CCD and evaluated the therapeutic effect in the sub-acute post-stroke stage. PATIENT CONCERNS: The 77-year-old male with cerebral infarction in the territory of the right anterior cerebral artery only underwent conservative treatment including hydration and aspirin in the acute post-stroke stage...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28078367/topographical-relationship-between-positions-of-lingual-foramina-and-attachment-of-mylohyoid-muscle-in-mental-region
#8
Naohiro Morikage, Tomohiro Hamada, Akinobu Usami, Satoshi Takada
PURPOSE: Lingual foramina can be observed between the lingual aspects of the mandible in humans. A sublingual artery is thought to exist in sublingual space and a submental artery in submaxillary space, which pierce the mandible through lingual foramina. During surgery for oral implant placement between apices of the mental foramen, it is important to determine the existence and positioning of lingual foramina. The purpose of this study was to investigate the positions of lingual foramina in relation to the mylohyoid muscle and vertical position of the mylohyoid line using cone-beam computed tomography (CBCT) images...
January 11, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28060193/imaging-in-chronic-thromboembolic-pulmonary-hypertension
#9
Rahul D Renapurkar, Sankaran Shrikanthan, Gustavo A Heresi, Charles T Lau, Deepa Gopalan
Chronic thromboembolic pulmonary hypertension (CTEPH) is one of the potentially curable causes of pulmonary hypertension and is definitively treated with pulmonary thromboendartectomy. CTEPH can be overlooked, as its symptoms are nonspecific and can be mimicked by a wide range of diseases that can cause pulmonary hypertension. Early diagnosis of CTEPH and prompt evaluation for surgical candidacy are paramount factors in determining future outcomes. Imaging plays a central role in the diagnosis of CTEPH and patient selection for pulmonary thromboendartectomy and balloon pulmonary angioplasty...
January 2, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28058533/the-numerical-stability-of-transformation-based-ct-ventilation
#10
Edward Castillo, Richard Castillo, Yevgeniy Vinogradskiy, Thomas Guerrero
: Computed tomography (CT)-derived ventilation imaging utilizes deformable image registration (DIR) to recover respiratory-induced tissue volume changes from inhale/exhale 4DCT phases. While current strategies for validating CT ventilation rely on analyzing its correlation with existing functional imaging modalities, the numerical stability of the CT ventilation calculation has not been characterized. PURPOSE: The purpose of this study is to examine how small changes in the DIR displacement field can affect the calculation of transformation-based CT ventilation...
January 5, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28050865/creation-and-characterization-of-normal-myocardial-perfusion-imaging-databases-using-the-iq%C3%A2-spect-system
#11
Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Chisato Kondo, Masayoshi Sarai, Yoriko Horiguchi, Takahiro Konishi, Masahisa Onoguchi, Takeshi Shimizu, Seigo Kinuya
BACKGROUND: Image acquisition by short-time single-photon emission-computed tomography (SPECT) has been made feasible by IQ·SPECT. The aim of this study was to generate normal databases (NDBs) of thallium-201 ((201)Tl) myocardial perfusion imaging for IQ·SPECT, and characterize myocardial perfusion distribution. METHODS AND RESULTS: We retrospectively enrolled 159 patients with a low likelihood of cardiac diseases from four hospitals in Japan. All patients underwent short-time (201)Tl myocardial perfusion IQ·SPECT with or without attenuation and scatter correction (ACSC) in either supine or prone position...
January 3, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28050719/sudden-benzodiazepine-induced-resolution-of-post-operative-pediatric-cerebellar-mutism-syndrome-a-clinical-spect-study
#12
Francesco Nicita, Milena Paiano, Mauro Liberatore, Alberto Spalice, Paola Papoff, Mariacristina Ullo, Manolo Piccirilli, Anna Clerico, Amalia Schiavetti
Post-operative pediatric cerebellar mutism syndrome (PPCMS) is a clinical syndrome arising from cerebellar injury and characterized by absence of speech and other possible symptoms and signs. Rare reports described some benefit after administration of dopamine agonist therapy, but no treatment has proven efficacy. In this paper, we report on the dramatic, sudden resolution of PPCMS induced by midazolam administration in a boy who underwent posterior fossa surgery for choroid plexus papilloma of the fourth ventricle...
January 3, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28048492/th-cd-206-07-determination-of-patient-specific-myocardial-mass-at-risk-using-computed-tomography-angiography
#13
L Hubbard, B Ziemer, S Malkasian, J Lipinski, B Sadeghi, H Javan, B Dertli, E Groves, S Molloi
PURPOSE: To evaluate the accuracy of a patient-specific coronary perfusion territory assignment algorithm that uses CT angiography (CTA) and a minimum-cost-path approach to assign coronary perfusion territories on a voxel-by-voxel basis for determination of myocardial mass at risk. METHODS: Intravenous (IV) contrast (370 mg/mL iodine, 25 mL, 7 mL/s) was injected centrally into five swine (35-45 kg) and CTA was performed using a 320-slice CT scanner at 100 kVp and 200 mA...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047196/th-ab-207a-11-anatomical-and-functional-assessment-of-coronary-artery-disease-using-low-dose-whole-organ-dynamic-computed-tomography
#14
L Hubbard, B Ziemer, J Lipinski, S Malkasian, B Sadeghi, H Javan, B Dertli, E M Groves, S Molloi
PURPOSE: To evaluate the accuracy of a low-dose, first-pass-analysis (FPA) dynamic computed tomography angiography and perfusion (CTAP) technique, for whole-organ anatomical and functional assessment of coronary artery disease (CAD). METHODS: An angioplasty balloon was advanced into the left anterior descending (LAD) coronary artery of five swine (35-45 kg) to induce several levels of stenosis at maximal hyperemia (intracoronary adenosine, 240 µg/min). Reference fluorescence microspheres and intravenous contrast (370 mg/mL iodine, 25 mL, 7 mL/s) were injected centrally and dynamic imaging was performed using a 320-slice CT scanner at 100 kVp and 200 mA...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046834/su-f-j-91-sparing-lung-function-in-treatment-planning-using-dual-energy-tomography
#15
A Lapointe, H Bahig, K Zerouali, D Blais, J De Guise, J Carrier, E Filion, D Roberge, S Bedwani
PURPOSE: To propose an alternate treatment plan that minimizes the dose to the functional lung tissues. In clinical situation, the evaluation of the lung functionality is typically derived from perfusion scintigraphy. However, such technique has spatial and temporal resolutions generally inferior to those of a CT scan. Alternatively, it is possible to evaluate pulmonary function by analysing the iodine concentration determined via contrast-enhanced dual energy CT (DECT) scan. METHODS: Five lung cancer patients underwent a scintigraphy and a contrast-enhanced DECT scan (SOMATOM Definition Flash, Siemens)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045690/clinical-case-of-the-month-a-49-year-old-man-who-presents-with-left-sided-weakness-an-update-on-ischemic-stroke
#16
Najy Masri, Rikki Weems, Falon Brown, Ben Andres, Fred Lopez
A 49 year-old man with a past medical history significant for essential hypertension, hyperlipidemia, and coronary artery disease status post percutaneous coronary intervention and stent placement in the right coronary artery in 2010 presented for evaluation of left hemiplegia. He was feeling well until three hours prior to presentation, at which time he fell while walking from his bedroom into the kitchen. After falling, he noticed that his left upper and lower extremities felt weak. He denied any symptoms preceding the fall or any loss of consciousness...
November 2016: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28040669/perfusion-computed-tomography-in-patients-with-stroke-thrombolysis
#17
Hiroyuki Kawano, Andrew Bivard, Longting Lin, Henry Ma, Xin Cheng, Richard Aviv, Billy O'Brien, Kenneth Butcher, Min Lou, Jingfen Zhang, Jim Jannes, Qiang Dong, Christopher R Levi, Mark W Parsons
Stroke shortens an individual's disability-free life. We aimed to assess the relative prognostic influence of pre- and post-treatment perfusion computed tomography imaging variables (e.g. ischaemic core and penumbral volumes) compared to standard clinical predictors (such as onset-to-treatment time) on long-term stroke disability in patients undergoing thrombolysis. We used data from a prospectively collected international, multicentre, observational registry of acute ischaemic stroke patients who had perfusion computed tomography and computed tomography angiography before treatment with intravenous alteplase...
December 31, 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28035179/molecular-neuroimaging-in-posttraumatic-stress-disorder
#18
REVIEW
Jooyeon Jamie Im, Eun Namgung, Yejee Choi, Jung Yoon Kim, Sandy Jeong Rhie, Sujung Yoon
Over the past decade, an increasing number of neuroimaging studies have provided insight into the neurobiological mechanisms of posttraumatic stress disorder (PSTD). In particular, molecular neuroimaging techniques have been employed in examining metabolic and neurochemical processes in PTSD. This article reviews molecular neuroimaging studies in PTSD and focuses on findings using three imaging modalities including positron emission tomography (PET), single photon emission computed tomography (SPECT), and magnetic resonance spectroscopy (MRS)...
December 2016: Experimental Neurobiology
https://www.readbyqxmd.com/read/28034567/comparison-between-perfusion-computed-tomography-and-dynamic-contrast-enhanced-magnetic-resonance-imaging-in-assessing-glioblastoma-microvasculature
#19
Zhong Zheng Jia, Wei Shi, Jin Long Shi, Dan Dan Shen, Hong Mei Gu, Xue Jun Zhou
PURPOSE: Perfusion computed tomography (PCT) and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) provide independent measurements of biomarkers related to tumor perfusion. The aim of this study was to compare the two techniques in assessing glioblastoma microvasculature. MATERIALS AND METHODS: Twenty-five patients diagnosed with glioblastoma (14 males and 11 females; 51±11years old, ranging from 33 to 70 years) were includede in this prospective study...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28027752/optimal-timing-of-image-acquisition-for-arterial-first-pass-ct-myocardial-perfusion-imaging
#20
G J Pelgrim, E R Nieuwenhuis, T M Duguay, R J van der Geest, A Varga-Szemes, C H Slump, S R Fuller, M Oudkerk, U J Schoepf, R Vliegenthart
PURPOSE: To determine the optimal timing of arterial first pass computed tomography (CT) myocardial perfusion imaging (CTMPI) based on dynamic CTMPI acquisitions. METHODS AND MATERIALS: Twenty-five patients (59±8.4years, 14 male)underwent adenosine-stress dynamic CTMPI on second-generation dual-source CT in shuttle mode (30s at 100kV and 300mAs). Stress perfusion magnetic resonance imaging (MRI) was used as reference standard for differentiation of non-ischemic and ischemic segments...
January 2017: European Journal of Radiology
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