( Ver. 1) QA IMRT QA-QC /(QA/QC) QA/QC QA/QC QOL QA Quality Assurance (QA) 9 01 14 CT
1 Medical Physicist
(Quality Control) (Quality Control) MLC MLC MLC MLC MLC MLC 1-1 Quality Assurance(QA) Quality Assurance(QA) QA
2-1 MLC 2-2 a. MLC b. 2-3SMLC MLC a. ±0.5mm b. MLC mm 1 2cm ()() MLC MLC MLC MLC 100cm=SAD ±0.5mm 2-4DMLC MLC a. 2-3-a ±0.2mm
b. 2-3-b ±0.2mm c. DMLC MLC 5mm MLC MLC STD=SAD MLC ±0.5% d. DMLC DMLC 0.2mm 2-4-c DMLC MLC 0.2mm 0.1cc 3-1 CT MLC ()
3-2 a. b. MLC c. d. e. MLC Tongue-and-Groove 3-3 a. b. MLC c. (TSCF: total scatter coefficient fraction) d. (PDD: percentage depth dose) e. (TPR: tissue phantom ratio) f. (Diagonal OCR) MLC PDD, TPR, OCR 3-4 1 4-1
MLC MLC MLC 4-2 CT a. MLC b. c. d. 4-3 a. CT Si TLD
4-5-b b. RANDO c. CT d. 2-2-b MLC 4-4 a. 01 01 01
b. ±1mm c. ICRU d. ±3% ±5% 4-5 a. b. c.
d. 1mm e. 50%±3% 30%±5% 4-6 4-7 a. 30 CT 5-1CT - a. CT CT CT b. CT
c. CT - ICRU Report 50 Prescribing, Recording, and Reporting Photon Beam Therapy, ICRU Washington D.C. 1993 01 01 Quality Assurance(QA) QA QA
IMRT QA-QC
MLC (QC) QC MLC ±0.5mm MLC 1mm SMLC QC 12cm MLC MLC ±0.5mm 1 SMLC ±0.2mm SMLC ±0.2mm 1 MLC 5mm MLC DMLC QC ±0.5% 1 DMLC MLC 0.1cc
ICRU ±1mm ±3% ±5% 1-1 50% 30% 1mm ±3% ±5%