Purpose: reduces patient dose, minimizes motion blur, reduces superimposition, improves spatial and contrast resolution.

Breast Tissue Composition

Changes with age: fatty vs dense tissue

Microcalcification Detection

Diagnostic requirement: ability to detect microcalcifications <500 μm.

Image Characteristics

Soft tissue radiography challenges: low subject contrast, similar effective atomic numbers and densities Techniques to enhance differential absorption (muscle vs fat).

Image Intensifier Components

Input phosphor: converts x-rays → light. o Photocathode: converts light → electrons. o Output phosphor: converts electrons → intensified light. o Flux gain, minification gain, brightness gain.

Eye adaptation: photopic (cones) vs scotopic (rods). o Visual acuity concentrated in the fovea centralis. Contrast perception of the human eye

Fluoroscopy Parameters

Typical mA: ≤5 mA. o Magnification mode: increases contrast resolution, spatial resolution, and patient dose. o Hybrid subtraction: combines temporal and energy subtraction. o Energy subtraction vs temporal subtraction: complexity, motion artifact.

power rating for nterventional radiography tube ≥20 kW. o Focal spot size for magnification ≤0.3 mm. o Sterile technique and patient monitoring during procedures.

Femoral artery puncture: 18-gauge Seldinger needle. o X-ray tube characteristics: small target angle, large anode, high power

History, IV hydration, pre-procedure labs, diet restrictions (e.g., clear liquids), but chest x-ray not always required.

interventional Radiology & Angiography qualifications

ARRT certification: CV/IR credentials (RT(R) CI, CV, etc.).

Interpolation allows reconstruction at any z-axis plane. o Pitch: couch movement vs beam rotation.

Preprocessing enhances contrast resolution. o Superior to analog for soft tissue imaging.

Sweep angle, scan time, number of projections, source-to-center-of-rotation distance.

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Stack #4691857

Question	Answer
Breast Compression	Purpose: reduces patient dose, minimizes motion blur, reduces superimposition, improves spatial and contrast resolution.
Breast Tissue Composition	Changes with age: fatty vs dense tissue
Microcalcification Detection	Diagnostic requirement: ability to detect microcalcifications <500 μm.
Image Characteristics	Soft tissue radiography challenges: low subject contrast, similar effective atomic numbers and densities Techniques to enhance differential absorption (muscle vs fat).
purpose of Fluoroscopy	dynamic (real-time) imaging
Image Intensifier Components	Input phosphor: converts x-rays → light. o Photocathode: converts light → electrons. o Output phosphor: converts electrons → intensified light. o Flux gain, minification gain, brightness gain.
Visual Perception	Eye adaptation: photopic (cones) vs scotopic (rods). o Visual acuity concentrated in the fovea centralis. Contrast perception of the human eye
Fluoroscopy Parameters	Typical mA: ≤5 mA. o Magnification mode: increases contrast resolution, spatial resolution, and patient dose. o Hybrid subtraction: combines temporal and energy subtraction. o Energy subtraction vs temporal subtraction: complexity, motion artifact.
X-ray Tube & Safety	power rating for nterventional radiography tube ≥20 kW. o Focal spot size for magnification ≤0.3 mm. o Sterile technique and patient monitoring during procedures.
Access & Equipment	Femoral artery puncture: 18-gauge Seldinger needle. o X-ray tube characteristics: small target angle, large anode, high power
Patient Preparation	History, IV hydration, pre-procedure labs, diet restrictions (e.g., clear liquids), but chest x-ray not always required.
interventional Radiology & Angiography qualifications	ARRT certification: CV/IR credentials (RT(R) CI, CV, etc.).
Advanced CT Concepts	Interpolation allows reconstruction at any z-axis plane. o Pitch: couch movement vs beam rotation.
igital Mammography	Preprocessing enhances contrast resolution. o Superior to analog for soft tissue imaging.
DRT Sweep Parameters	Sweep angle, scan time, number of projections, source-to-center-of-rotation distance.

Created by: Gina_d2

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