Technical prerequisites and imaging protocols for CT perfusion imaging in oncology

Area of Science:

• Radiology
• Medical Imaging
• Oncology

Background:

• CT perfusion imaging offers functional insights crucial for oncology.
• Challenges in abdominal and thoracic imaging include attenuation and patient motion.
• Optimizing dose while maintaining image quality is essential for widespread clinical adoption.

Purpose of the Study:

• To define technical prerequisites for state-of-the-art CT perfusion imaging in oncology.
• To identify methods for achieving reasonable radiation dose levels.
• To explore simultaneous acquisition of morphological and functional data.

Main Methods:

• Review of low kV dynamic scanning techniques.
• Analysis of detector technology for low photon flux.
• Discussion of temporal sampling, scan duration, and contrast medium injection protocols.
• Examination of 4D imaging for combined morphological and functional assessment.

Main Results:

• Low kV dynamic scanning with optimized detectors significantly reduces radiation dose.
• Appropriate temporal sampling and scan duration are critical for accurate perfusion assessment.
• Optimized contrast protocols are essential for dose limitation.
• Simultaneous morphological and functional data extraction is feasible.

Conclusions:

• Low kV dynamic scanning and optimized detectors are paramount for dose reduction in oncologic CT perfusion.
• Careful protocol selection, including temporal sampling and contrast administration, is vital.
• Integrated 4D imaging holds promise for broader application of dynamic contrast-enhanced CT in oncology.