Short-term effects of exercise on optic nerve and macular perfusion measured by optical coherence tomography angiography
Purpose: To evaluate the effects of exercise on optic nerve and macular perfusion using optical coherence tomography angiography. Methods: Thirteen eyes of 13 healthy volunteers were examined using a high-speed and high-resolution spectral-domain optical coherence tomography XR Avanti with a split-spectrum amplitude-decorrelation angiography algorithm. Blood pressure, heart rate, the mean area of the foveal avascular zone , and flow density on the optic nerve head and macula, before and after exercise were measured and analyzed. Results: Mean patient age was 27.3 ± 3.5 years. Heart rate, systolic and diastolic blood pressure increased significantly after exercise (P
First magnetic particle imaging angiography in human sized organs by employing a multimodal ex vivo pig kidney perfusion system. Physiol Meas. 2019 Sep 13;: Authors: Molwitz I, Ittrich H, Knopp T, Mummert T, Salamon J, Jung C, Adam G, Kaul MG Abstract Objective Magnetic Particle Imaging (MPI) is a new, fast and three-dimensional imaging technique, which is considered promising for angiographies. As available MPI-scanners suffer from restricted spatial resolution and are mostly constructed for small animal imaging, no vessels within one organ have been depicted by MPI, yet. The purpose of this...
Objectives The aim of this study was to evaluate the feasibility of a computed tomography (CT) protocol enabling the visualization of the prostatic artery (PA) before prostatic artery embolization (PAE) in benign prostatic hyperplasia, which provides quantitative perfusion information of the prostate gland. Materials and Methods In this institutional review board–approved study, 22 consecutive patients (mean age, 67 ± 7 years) who were planned to undergo PAE underwent a dynamic CT scan of the pelvis (scan range, 22.4 cm; cycle time, 1.5 seconds; scan time, 44 seconds; 25 scan cycles; 70 kVp; 100 mAs) afte...
ConclusionsResponsiveness of pancreatic cancer to regional chemotherapy is drug exposure dependent. The isolated perfusion procedure is superior to intra-arterial infusion in survival times.
Abstract BACKGROUND: Previous studies have estimated that the risk of recurrent stroke was nearly 20% shortly after a transient ischemic attack (TIA) or minor stroke. A missing or hypoplastic (
Publication date: Available online 7 September 2019Source: Journal of Cardiology CasesAuthor(s): Shozo Sueda, Hiroaki KohnoAbstractA 61-year-old man was admitted to our hospital due to chest pain on both rest and effort. After the computed tomography coronary angiography, coronary stenosis was recognized at segment 3. Because inferior ischemia on stress myocardial perfusion scintigraphy with 201 thallium chloride induced by adenosine was found, we planned to perform the coronary intervention. After control coronary angiography, no significant stenosis was found in the right coronary artery. Intracoronary acetylcholine test...
To explore the relationship between computed tomography (CT) angiography (CTA)-derived collateral status and CT perfusion (CTP)-derived tissue viability.
ConclusionsPerfusion defect reversibility improved specificity in female patients for detection of coronary disease compared to perfusion defect size and extent alone. Supine images provided superior accuracy for detection of coronary disease compared to upright images.
Objectives: Endovascular therapy (EVT) improves outcomes for appropriately selected acute ischemic stroke patients. Guidelines suggest rapid acquisition of noninvasive vascular imaging to screen suspected ischemic stroke patients for large vessel occlusion (LVO) and candidacy for EVT. We sought to quantify the yield of an LVO stroke screening process in an undifferentiated emergency department (ED) suspected stroke population as well as identify predictors of successful EVT. Methods: We identified a cohort of consecutive ED patients who received CT angiography and brain perfusion (CTA/P) imaging to determine candidacy for EVT during 2016.
In 2009, the Society of Interventional Radiology (SIR) published training guidelines for intraarterial catheter-directed treatment of acute ischemic stroke (1). At that time, catheter-directed thrombolysis was the dominant endovascular therapy and the only such therapy studied in randomized trials (2,3). Only first-generation mechanical thrombectomy devices were available. Computed tomographic (CT) angiography, magnetic resonance (MR) angiography, and perfusion imaging were not routinely used for assessment of large-vessel occlusion and/or parenchymal infarction and ischemia.
Conclusion: IcGA is safe to use as demonstrated by the very low rate of complications in this case series. It is also safe to rely on to guide re-resection and recreation of an anastomosis intraoperatively by demonstration of blood flow. This may help offset the loss of tactile feedback and assessment of tension in the robotic platform. PMID: 31467710 [PubMed]