An important step in the diagnosis and treatment of vessel disease is the qualitative assessment and quantitative measurement of blood flow through the diseased vessels and surrounding areas. In X-ray angiography, standard x-ray images are acquired of the region o interest following injection of an opaque contrast agent, which enters the bloodstream and permit an accurate visual depiction of blood flow through vessels. Using X-ray angiography, blood flow can be approximately measured by employing kinematics to describe the movement of contras dye along a linear portion of the vessel. a. Discuss how blood flow velocity can be measured using approximations. b. Explain how the following factors affect the blood velocity and volume flow rate as well a potential risks for stroke: į. the pulsatile nature of blood flow, ii. elasticity of the wall of the blood vessels, and iii gradual narrowing and curvature of blood vessels
An important step in the diagnosis and treatment of vessel disease is the qualitative assessment and quantitative measurement of blood flow through the diseased vessels and surrounding areas. In X-ray angiography, standard x-ray images are acquired of the region o interest following injection of an opaque contrast agent, which enters the bloodstream and permit an accurate visual depiction of blood flow through vessels. Using X-ray angiography, blood flow can be approximately measured by employing kinematics to describe the movement of contras dye along a linear portion of the vessel. a. Discuss how blood flow velocity can be measured using approximations. b. Explain how the following factors affect the blood velocity and volume flow rate as well a potential risks for stroke: į. the pulsatile nature of blood flow, ii. elasticity of the wall of the blood vessels, and iii gradual narrowing and curvature of blood vessels
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Transcribed Image Text:1. X-ray Angiography and Blood Flow Measurement
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3 Captures X-rays passing through
the patient's body
X-ray tube assembly
2 Limits the X-ray beams to
the appropriate area
X-ray flat panel detector
1 Emits X-rays from
the X-ray tube
4 Processes the detected data into
an image with reduced noise
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5 Displays the image on
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An important step in the diagnosis and treatment of vessel disease is the qualitative
assessment and quantitative measurement of blood flow through the diseased vessels and
surrounding areas. In X-ray angiography, standard x-ray images are acquired of the region of
interest following injection of an opaque contrast agent, which enters the bloodstream and permits
an accurate visual depiction of blood flow through vessels. Using X-ray angiography, blood flow
can be approximately measured by employing kinematics to describe the movement of contrast
dye along a linear portion of the vessel.
a. Discuss how blood flow velocity can be measured using approximations.
b. Explain how the following factors affect the blood velocity and volume flow rate as well as
potential risks for stroke:
į. the pulsatile nature of blood flow,
ii. elasticity of the wall of the blood vessels, and
iii. gradual narrowing and curvature of blood vessels.
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