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  • The Correct Selection of Pitch for Optimal CT Scanning: The . . .
    best compromise in patient dose, slice sensitivity profiles, and artifacts for most exams was a pitch of 1 3 to 1 4 Thus increasing the pitch from lower pitches up to about 1 4 was considered a good way to reduce patient dose, without increasing the image noise, since the dose was inversely proportional to the pitch
  • Strategies for Reducing Radiation Dose in CT - PMC
    By comparing patient effective dose to background radiation dose from natural sources, which in the U S averages 3 mSv per year with a range across the U S from 1–10 mSv 2, patients and their families are better able to put the risk associated with medical doses into perspective
  • CT Scan Parameters and Radiation Dose: Practical Advice for . . .
    Several multidetector CT parameters can be changed to reduce radiation dose, including detector configuration, tube current, kVp, reconstruction algorithm, patient positioning, scan range, reconstructed slice thickness, and pitch
  • Strategies for Reducing Radiation Dose in CT Scan
    Another method for reducing radiation dose with helical scanning is to increase the pitch of the examination Vade and co-workers showed that increasing the pitch from 1 0 to 1 5 decreased the dose by 33% without apparent loss of diagnostic information
  • Correct Selection of Pitch in CT JACR 415 | PDF | Ct Scan . . .
    This document summarizes common misconceptions about selecting the optimal pitch for CT scanning It discusses two major misconceptions: 1) that increasing the pitch is a good way to reduce patient dose, and 2) that pitches less than 1 overirradiate patients due to beam overlap
  • SU-E-I-60: The Correct Selection of Pitch and Rotation Time . . .
    By decreasing the pitch and the rotation times by equal amounts, both helical and patient motion artifacts can be reduced without affecting the exam time The use of lower helical pitch also allows better scanning of larger patients by allowing a greater scan effective mAs, if the exam time can be extended
  • Low pitch significantly reduces helical artifacts in abdominal CT
    Low pitch CT scans reduce helical artifacts produced at bowel interfaces While controlling other settings to prevent increased radiation dose, consideration should be made for low helical pitch scanning to improve image quality, particularly when bowel or peritoneal pathology is suspected





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