Applications of asymmetric collimation on linear accelerators

Robin L Stern, Seth A. Rosenthal, E. Catherine Doggett, Jasvinder K. Mangat, Theodore L. Phillips, Janice K. Ryu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Frequency of use of asymmetric collimation (AC) at an academic radiation oncology center equipped with AC-capable linear accelerators was determined, and the type of use was cataloged. Records of patients beginning radiation treatment at U.C. Davis Cancer Center within a 3-month period (3/1/92 to 5/31/92) were reviewed. Forty-seven percent of 102 patients and 56% of 123 courses of treatment involved AC. Six common uses of AC were identified: beam-split field matching, planned boosts, other field size changes, adjustments to match divergent fields, matchline feathering, and opposed tangential fields. This study demonstrates that asymmetric collimation is a useful and powerful clinical treatment tool with widespread applications to radiation therapy.

Original languageEnglish (US)
Pages (from-to)95-98
Number of pages4
JournalMedical Dosimetry
Issue number2
StatePublished - 1995


  • Asymmetric collimation
  • Asymmetric jaws
  • Independent jaws

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Medicine(all)


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