Stress Test Cerebral Perfusion Imaging

Load test cerebral blood flow perfusion imaging: routine cerebral blood flow perfusion imaging often can not find cerebral blood flow reserve decline, observation of cerebral blood flow and metabolic changes through load test can improve ischemic lesions, especially potential ischemia Positive detection rate of sexual lesions. Commonly used load test methods include acetazolamide test, CO2 inhalation test, exercise stimulation, Wadas test, Matas test and TCM acupuncture. Basic Information Specialist Category: Cardiovascular Examination Category: CT Applicable gender: whether men and women apply fasting: not fasting Tips: Check before taboo: 400mg of potassium perchlorate orally before the examination to block the choroid plexus; 10 minutes before the injection of the imaging agent, wear a black eye mask and earplugs, until 10 minutes after the injection can be removed, always closed before the imaging rest. Normal value There were no relative radioactive reduction or defect areas on the image. Clinical significance Abnormal results acetazolamide can inhibit the activity of carbonic anhydrase in the brain, causing the pH value in the brain to decrease. Under normal circumstances, it will cause cerebral vasodilation reflexively, resulting in an increase of rCBF of 20% to 30% due to this expansion of diseased blood vessels. The response was weak, resulting in an insignificant increase in rCBF in the potentially ischemic and ischemic areas, with relatively radioactive deficits or defects in the image. The people in need of examination have patients with cerebral ischemic diseases. Precautions Pre-examination contraindications: 400 mg of potassium perchlorate was given orally before 30 minutes to seal the choroid plexus; 10 minutes before the injection of the imaging agent, a black eye mask and earplugs should be worn until 10 minutes after the injection, and the eyes were closed before the imaging. Requirements during inspection: The head cannot be moved during the inspection to ensure the authenticity of the image. Inspection process Brain SPECT: 2 g of acetazolamide was orally administered after 48 hours, and SPECT was performed 2 hours later. The patient lies on the fault bed and brakes his head. The imaging instrument is a GE scissor Elscint APEXSPXHELIX dual-probe multi-function SPECT instrument equipped with a high-resolution fan collimator. Acquisition matrix 128×128, magnification 1.0, step acquisition, 1 frame per rotation, 6 frames, a total of 60 frames, 2530s per frame. The original data was processed by a computer workstation (X-Pert) and the reconstruction was performed with Henning filtering with an attenuation correction factor of 0.11. Cross-sectional, coronal, and sagittal tomographic images parallel to the line connecting the external and external ear holes were obtained. Not suitable for the crowd Inappropriate people: not yet known.

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