Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT
Background: Patients diagnosed with dominant intraprostatic lesions (DIL) may need radiation doses over than 80 Gy. Dose-painting by contours (DPC) is a useful technique which helps the patients. Dose-painting approach need to be evaluated. Objective: To evaluate the DCP technique in the case of boo...
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| Format: | Article |
| Language: | English |
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Shiraz University of Medical Sciences
2022-08-01
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| Series: | Journal of Biomedical Physics and Engineering |
| Subjects: | |
| Online Access: | https://jbpe.sums.ac.ir/article_47644_ccfdb9f47958024430ab1128affd2cf1.pdf |
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| author | Khadijeh Bamneshin Seied Rabi Mahdavi Ahmad Bitarafan-Rajabi Parham Geramifar Payman Hejazi Fereshteh Koosha Majid Jadidi |
| author_facet | Khadijeh Bamneshin Seied Rabi Mahdavi Ahmad Bitarafan-Rajabi Parham Geramifar Payman Hejazi Fereshteh Koosha Majid Jadidi |
| author_sort | Khadijeh Bamneshin |
| collection | DOAJ |
| description | Background: Patients diagnosed with dominant intraprostatic lesions (DIL) may need radiation doses over than 80 Gy. Dose-painting by contours (DPC) is a useful technique which helps the patients. Dose-painting approach need to be evaluated. Objective: To evaluate the DCP technique in the case of boosting the DILs by radiobiological parameters, tumor control probability (TCP), and normal tissue complication probability (NTCP) via PET/CT images traced by 68Ga-PSMA.Material and Methods: In this analytical study, 68Ga-PSMA PET/CT images were obtained from patients with DILs that were delineated using the Fuzzy c-mean (FCM) algorithm and thresholding methods. The protocol of therapy included two phases; at the first phase (ph1), a total dose of 72 Gy in 36 fractions were delivered to the planning target volume (PTV1); the seconds phase consisted of the application of variable doses to the PTV2. Moreover, two concepts were also considered to calculate the TCP using the Zaider-Minerbo model. Results: The lowest volume in DILs belonged to the DIL1 extracted by the FCM method. According to dose-volume parameters of the rectum and bladder, by the increase in the PTV dose higher than 92 Gy, the amounts of rectum and bladder doses are increased. There was no difference between the TCPs of DILs at doses higher than 86 Gy and 100 Gy for ordinary and high clone density, respectively. Conclusion: Consequently, our dose-painting approach for DILs, extracted by the FCM method via PET/CT images, can reduce the total dose for prostate radiation with 100% tumor control and less normal tissue complications. |
| first_indexed | 2024-04-14T03:05:27Z |
| format | Article |
| id | doaj.art-e7c7154df92d43ec97ee44793c6ca804 |
| institution | Directory Open Access Journal |
| issn | 2251-7200 |
| language | English |
| last_indexed | 2024-04-14T03:05:27Z |
| publishDate | 2022-08-01 |
| publisher | Shiraz University of Medical Sciences |
| record_format | Article |
| series | Journal of Biomedical Physics and Engineering |
| spelling | doaj.art-e7c7154df92d43ec97ee44793c6ca8042022-12-22T02:15:45ZengShiraz University of Medical SciencesJournal of Biomedical Physics and Engineering2251-72002022-08-0112436937610.31661/jbpe.v0i0.1912-100647644Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CTKhadijeh Bamneshin0Seied Rabi Mahdavi1Ahmad Bitarafan-Rajabi2Parham Geramifar3Payman Hejazi4Fereshteh Koosha5Majid Jadidi6PhD, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, IranPhD, Radiation Biology Research Center, Iran University of Medical Sciences, Tehran, IranPhD, Echocardiography Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IranPhD, Department of Nuclear Medicine, Shariati Hospital Tehran University of Medical Sciences, Tehran, IranPhD, Department of Medical Physics, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, IranPhD, Department of Radiology Technology, Faculty of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, IranPhD, Department of Medical Physics, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, IranBackground: Patients diagnosed with dominant intraprostatic lesions (DIL) may need radiation doses over than 80 Gy. Dose-painting by contours (DPC) is a useful technique which helps the patients. Dose-painting approach need to be evaluated. Objective: To evaluate the DCP technique in the case of boosting the DILs by radiobiological parameters, tumor control probability (TCP), and normal tissue complication probability (NTCP) via PET/CT images traced by 68Ga-PSMA.Material and Methods: In this analytical study, 68Ga-PSMA PET/CT images were obtained from patients with DILs that were delineated using the Fuzzy c-mean (FCM) algorithm and thresholding methods. The protocol of therapy included two phases; at the first phase (ph1), a total dose of 72 Gy in 36 fractions were delivered to the planning target volume (PTV1); the seconds phase consisted of the application of variable doses to the PTV2. Moreover, two concepts were also considered to calculate the TCP using the Zaider-Minerbo model. Results: The lowest volume in DILs belonged to the DIL1 extracted by the FCM method. According to dose-volume parameters of the rectum and bladder, by the increase in the PTV dose higher than 92 Gy, the amounts of rectum and bladder doses are increased. There was no difference between the TCPs of DILs at doses higher than 86 Gy and 100 Gy for ordinary and high clone density, respectively. Conclusion: Consequently, our dose-painting approach for DILs, extracted by the FCM method via PET/CT images, can reduce the total dose for prostate radiation with 100% tumor control and less normal tissue complications.https://jbpe.sums.ac.ir/article_47644_ccfdb9f47958024430ab1128affd2cf1.pdfdose-response relationship, radiationprostatepositron-emission tomography |
| spellingShingle | Khadijeh Bamneshin Seied Rabi Mahdavi Ahmad Bitarafan-Rajabi Parham Geramifar Payman Hejazi Fereshteh Koosha Majid Jadidi Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT Journal of Biomedical Physics and Engineering dose-response relationship, radiation prostate positron-emission tomography |
| title | Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT |
| title_full | Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT |
| title_fullStr | Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT |
| title_full_unstemmed | Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT |
| title_short | Evaluation of Dose-Painting in the Dominant Intraprostatic Lesions by Radiobiological Parameters using 68Ga- PSMA PET/CT |
| title_sort | evaluation of dose painting in the dominant intraprostatic lesions by radiobiological parameters using 68ga psma pet ct |
| topic | dose-response relationship, radiation prostate positron-emission tomography |
| url | https://jbpe.sums.ac.ir/article_47644_ccfdb9f47958024430ab1128affd2cf1.pdf |
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