24.1e X-Ray Attenuation and Absorption | A2 Medical Physics | Cambridge A Level Physics
What happens to X-Ray intensity when it passes through objects?
00:00 Defining attenuation
01:55 Incident and transmitted/emergent intensity
03:54 Graph - Exponential decrease
05:04 Intensity attenuation equation
07:29 Linear absorption/attenuation coefficient
11:52 Half-value thickness derivation
17:52 Attenuation equation for collimated beam only
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Practice Past Year Questions
*starred Q's are in example videos
MJ12 P42 Q10 (pg45) X-ray of finger.
MJ13 P41 Q10 (pg47) Sharpness & Intensity ratio
MJ13 P42 Q11 (pg47) Attenuation & Intensity ratio
MJ15 P41 Q11 (pg50) Blood vs Muscle Attenuation
ON15 P41 Q10 (pg50) Bone vs Muscle
ON15 P43 Q11 (pg51) Intensity Ratio & Contrast*
MJ17 P41 Q10 (pg53) Intensity Ratio
FM18 P42 Q12 (pg54) Metal Intensity Ratio & decibels*
MJ18 P41 Q12 (pg54) Thumb X-Ray*
FM20 P42 Q11 (pg55) Attenuation and Image
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