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Transcranial Doppler sonography (ultrasound) - Radiopaedia.org
Nov 29, 2022 · within three days status post-SAH, an increase in the middle cerebral artery baseline velocity by more than 21 cm/seconds/day is considered highly suggestive of vasospasm. velocities exceeding 160 cm/s are usually required to produce symptoms. a lindegaard ratio above 3.0 is considered diagnostic. ratios above 6.0 are indicative of severe vasospasm
Middle cerebral artery - Radiopaedia.org
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Fetal MCA systolic/diastolic ratio - Radiopaedia.org
Mar 24, 2016 · Fetal MCA systolic/diastolic (S/D) ratio is an important parameter in fetal middle cerebral arterial Doppler assessment. It is a useful predictor of fetal distress and intrauterine growth restriction (IUGR).
Radiopaedia.org
Fetal middle cerebral arterial Doppler assessment evaluates fetal cardiovascular distress, anemia, or hypoxia and complements umbilical artery Doppler assessment.
Fetal middle cerebral artery pulsatility index
May 30, 2020 · The fetal middle cerebral artery (MCA) pulsatility index (PI) is a key parameter used in fetal middle cerebral arterial Doppler assessment. It is calculated by subtracting the end-diastolic velocity (EDV) from the peak systolic velocity (PSV) and then dividing by the time-averaged (mean) velocity (TAV):
Fetal middle cerebral arterial peak systolic velocity
Feb 12, 2024 · The fetal middle cerebral arterial (MCA) peak systolic velocity (PSV) is an important parameter in fetal MCA Doppler assessment.
Ischemic stroke | Radiology Reference Article - Radiopaedia.org
Nov 24, 2024 · Transcranial Doppler ultrasound. Often described as an emerging application of point-of-care ultrasonography, use of transcranial Doppler (TCD) sonography has been utilized for the diagnosis of intracranial vessel occlusion, as well as the differentiation between ischemic and hemorrhagic stroke 14.
Fetal anemia | Radiology Reference Article | Radiopaedia.org
Sep 27, 2021 · increase in fetal middle cerebral arterial (MCA) Doppler peak systolic velocity (PSV): may occur before precipitation of fetal hydrops; changes in fetal MCA Doppler are reported to have 88% sensitivity and an 82% specificity for detection of fetal anemias Fetal MRI. MRI can be used to detect fetal anemia 8 and some of its sequellae. T1 and T2 ...
Umbilical arterial Doppler assessment - Radiopaedia.org
Feb 12, 2024 · Umbilical arterial (UA) Doppler assessment is used to survey fetal well-being in the third trimester of pregnancy. Abnormal umbilical artery Doppler is a marker of placental insufficiency and consequent intrauterine growth restriction (IUGR) or suspected pre-eclampsia.