نتایج جستجو برای: lung ventilation scintigraphy

تعداد نتایج: 353944  

2015

Background: Pulmonary embolism (PE) is diagnosed either by ventilation/perfusion (V/Q) scintigraphy or pulmonary CT angiography. One of the imaging methods used in nuclear medicine is hybrid SPECT/CT scintigraphy. Objectives: The aim of this study was to evaluate the utility of SPECT/CT(Q) scintigraphy in the diagnosis of PE and to compare SPECT/ CT(Q) with planar(Q) and SPECT(Q) methods. Metho...

Journal: :Journal of aerosol medicine and pulmonary drug delivery 2013
Kirby L Zeman Jihong Wu Scott H Donaldson William D Bennett

BACKGROUND Quantification of particle deposition in the lung by gamma scintigraphy requires a reference image for location of regions of interest (ROIs) and normalization to lung thickness. In various laboratories, the reference image is made by a transmission scan ((57)Co or (99m)Tc) or gas ventilation scan ((133)Xe or (81)Kr). There has not been a direct comparison of measures from the two me...

Journal: :Respiration; international review of thoracic diseases 2015
Andrzej Mazurek Miroslaw Dziuk Ewa Witkowska-Patena Stanislaw Piszczek Agnieszka Gizewska

BACKGROUND Pulmonary embolism (PE) is diagnosed either by ventilation/perfusion (V/Q) scintigraphy or pulmonary CT angiography. One of the imaging methods used in nuclear medicine is hybrid SPECT/CT scintigraphy. OBJECTIVES The aim of this study was to evaluate the utility of SPECT/CT(Q) scintigraphy in the diagnosis of PE and to compare SPECT/CT(Q) with planar(Q) and SPECT(Q) methods. METH...

Journal: :Seminars in respiratory and critical care medicine 2003
G H Mills J M Wild B Eberle E J R Van Beek

Beyond being a substitute for X-ray, computed tomography, and scintigraphy, magnetic resonance imaging (MRI) inherently combines morphologic and functional information more than any other technology. Lung perfusion: The most established method is first-pass contrast-enhanced imaging with bolus injection of gadolinium chelates and time-resolved gradient-echo (GRE) sequences covering the whole lu...

Journal: :International Journal of Cardiovascular Sciences 2018

Journal: :bulletin of emergency and trauma 0
farooq ahmad ganie department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india. hafeezulla lone department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india. ghulam nabi lone department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india. mohd lateef wani department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india. shyam singh department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india. abdual majeed dar department of cardiovascular and thoracic surgery, sher-i-kashmir institute of medical sciences (skims), soura, kashmir, india.

lung contusion is an entity involving injury to the alveolar capillaries, without any tear or cut in the lung tissue. this results in accumulation of blood and other fluids within the lung tissue. the excess fluid interferes with gas exchange leading to hypoxia. the pathophysiology of lung contusion includes ventilation/perfusion mismatching, increased intrapulmonary shunting, increased lung wa...

Journal: :archives of anesthesiology and critical care 0
atabak najafi department of anesthesiology and critical care, sina hospital, tehran university of medical sciences, tehran, iran

variability of tidal volume and respiratory rate in normally breathing man has long been demonstrated [1]. however because of lack of knowledge and technology primary ventilators could only deliver a fixed tidal volume in a fixed rate the so called volume controlled ventilation (vcv). vcv was volume preset time triggered and cycled and there was no synchronization with patient’s breaths. at tha...

Journal: :Deutsches Aerzteblatt Online 2011

جوهری دها, فریبا, رسانه, سمیرا,

Background and Objective: In nuclear medicine, lung perfusion scintigraphy is performed by radiolabeled particles, 99 mTc-albumin macroaggregated. Synthesizing of the particles has some difficulties. In order to resolve this problem, chitosan microparticles were used as an alternative choice.  Materials and Methods: The qualitative control tests including: the determining particles size...

Journal: :anesthesiology and pain medicine 0
oliver c. radke department of anesthesiology and intensive care medicine,klinikum bremerhaven-reinkenheide, postbrookstr. 103, 27574 bremerhaven, germany; department of anesthesia and perioperative care, san francisco general hospital, university of california san francisco, san francisco, california, usa; department of anaesthesiology and intensive care medicine, university hospital, technische universitat dresden, germany; department of anesthesiology and intensive care medicine, klinikum bremerhaven-reinkenheide, postbrookstr. 103, 27574 bremerhaven, germany. tel: +49-471 2993268, fax: +49-4712993286 thomas schneider department of anaesthesiology and intensive care medicine, university hospital, technische universitat dresden, germany elisabeth vogel department of anaesthesiology and intensive care medicine, university hospital, technische universitat dresden, germany thea koch department of anaesthesiology and intensive care medicine, university hospital, technische universitat dresden, germany

conclusions pressure support ventilation, but not spontaneous breathing, induces a significant redistribution of ventilation towards the ventral region. the sensitivity of the support trigger appears to influence the distribution of ventilation only during the early phase of inspiration. background in supine position, pressure support ventilation causes a redistribution of ventilation towards t...

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