Daily patient geometry correction: application of NAL and eNAL protocols

• Autorzy: Dąbrowski Andrzej , Zielińska-Dąbrowska Sylwia , Kuszewski Tomasz , Lis Krzysztof

Identyfikatory

DOI

10.2478/pjmpe-2020-0021

• Języki publikacji: EN

Abstrakty

EN

Purpose: To test the NAL and eNAL correction protocols using daily patient setup displacements. Methods and material: In total, the analysis was performed for 749 and 797 kV CBCT images for gynecological and prostate patients, respectively, each of 30 patients. After the planning procedure, patients were set up on the treatment table in the treatment position every day. The on-line correction protocol was applied. KV CBCT images were acquired by means of x-ray lamp mounted orthogonally on Linac. Patient setup displacement was assigned. NAL and eNAL corrections protocols were simulated using daily data from online corrections for these two groups of patients. The overall systematic error and random error were calculated for each direction. Results: For the prostate group, the random errors for daily Raw data (no correction) in LAT, LONG, and VERT directions were 2.0 mm, 1.6 mm, and 3.2 mm, respectively. For NAL and eNAL protocols, they were in the range of 1.8 mm to 3.2 mm. For the gynecological group, the random errors were: for daily Raw data 2.2 mm, 1.7 mm, and 3.2 mm, respectively. For NAL and eNAL protocols, they were in the range of 2.0 to 3.4 mm. For the prostate group, values of systematic errors 1.8 mm, 1.8 mm, and 3.3 mm, respectively for Raw data. For NAL and eNAL protocols, these values were less than 1.8 mm. For the gynecological group, the systematic errors were 2.6 mm, 2.3 mm, and 2.8 mm, respectively, for Raw data. For NAL ana eNAL protocols less than 1.8 mm. For the gynecological group, for Raw data, 45% of the total displacement vectors exceeded 5 mm, whereas only 25% did after the NAL procedure and 29% after the eNAL procedure. For the prostate group, for Raw data, 34% of the total displacement vectors exceeded 5 mm, whereas only 22% did after NAL procedure and 28% after eNAL procedure Conclusions: For gynecological and prostate cancer patients, the NAL and eNAL correction protocols can be safely applied to substantially reduce setup errors.

Słowa kluczowe

EN

set-up control; correction protocols; geometry errors

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2020
• Tom: Vol. 26, Iss. 4
• Strony: 181--184
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Dąbrowski Andrzej

• Physics Instytute, Jan Kochanowski University, ul. Uniwersytecka 7, 25-406 Kielce, Poland
• Medical Physics Department, Holycross Cancer Centre, Artwińskiego 3, 25-374 Kielce, Poland

autor

Zielińska-Dąbrowska Sylwia

• Medical Physics Department, Holycross Cancer Centre, Artwińskiego 3, 25-374 Kielce, Poland

autor

Kuszewski Tomasz

• Physics Instytute, Jan Kochanowski University, ul. Uniwersytecka 7, 25-406 Kielce, Poland
• Medical Physics Department, Holycross Cancer Centre, Artwińskiego 3, 25-374 Kielce, Poland

autor

Lis Krzysztof

• Medical Physics Department, Holycross Cancer Centre, Artwińskiego 3, 25-374 Kielce, Poland

Bibliografia

• 1. Kukołowicz P. Zalecenia PTFM dotyczące prowadzenia kontroli ułożenia pacjentów leczonych wiązkami zewnętrznymi. Część II – Metody. Pol J Med Phys Eng. 2015;21(1):3-26.
• 2. Stroom JC, Manouk JJ, Olofsen-van Acht et al. On-line setup corrections during radiotherapy of patients with gynecologic tumors, Int J Radiat Oncol. 2000;46:499-506.
• 3. de Boer JCJ, Heijmen BJM. A protocol for the reduction of systematic patient set-up errors with minimal portal imaging workload. Int J Radiat Oncol Biol Phys. 2001;50:1350-1365.
• 4. de Boer JCJ, Heijmen BJM. eNAL: an extension of the NAL setup correction protocol for effective use of weekly follow-up measurements. Int J Radiat Oncol Biol Phys. 2007;67:1586-1595.
• 5. Remeijer P, Geerlof E, Ploeger L, et al. 3D Portal image analysis in clinical practice: an evaluation of 2D and 3D analysis techniques as applied to 30 prostate cancer patients. Int J Radiat Oncol Biol Phys. 2000;46:1281-1290.
• 6. Dąbrowski A, Kukołowicz P F, Sadowska E. Quantitative evaluation of setup deviations during the course of pelvic irradiation with 4 field box technique. Nowotwory. 2001;51(2):123-128.
• 7. Stroom JC, Manouk JJ, Olofsen-van Acht et al. On-line setup corrections during radiotherapy of patients with gynecologic tumors, Int J Radiat Oncol. 2000;46:499-506.
• 8. Martens D, Luesink M, Huizenga H, Pasma KL, eNAL++: a new and effective off-line correction protocol for rotational setup errors when using a robotic couch. Med Phys. 2015;16(6):177-184.
• 9. Hurkmans CW, Remeijer P, Lebesque JV. et al. Set-up verification using portal imaging; review of current clinical practice. Radiother Oncol. 2001;58105-120.
• 10. El-Gayed AH, Bartelink H, Bel A, et al. Evaluation of time trend of setup deviations during the course of pelvic irradiation using an electronic portal imaging device. Radiother Oncol. 1992;24:45-54.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).