Fine tuning of linear accelerator accessories for stereotactic radiotherapy

Engler, Mark J.; Curran, Bruce; Tsai, Jason Sheng‐Hong; Sternick, Edward S.; Selles, W D; Wazer, David E.; Mason, William P.; Sailor, T.; Mackie, Thomas Rockwell

doi:10.1016/0360-3016(94)90121-x

Cited by 17 publications

(2 citation statements)

References 17 publications

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“…Over the last three decades, the localization accuracy of LINAC based platforms has been evaluated quantitatively in multiple publications for radiosurgery procedures. [5][6][7][8][9][10][11][12][13] Presently, treatment platforms have become more complicated with multiple imaging modalities for localization and gating throughout treatment. [14][15][16] Therefore, it is critical to quantify the targeting accuracy throughout the entire treatment workflow and to measure the correlation of each imaging modality to the radiation isocenter.…”

Section: Introductionmentioning

confidence: 99%

Technical Note: Evaluation of the systematic accuracy of a frameless, multiple image modality guided, linear accelerator based stereotactic radiosurgery system

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Technical Note: Evaluation of the systematic accuracy of a frameless, multiple image modality guided, linear accelerator based stereotactic radiosurgery system

et al. 2016

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“…The target is then irradiated at different gantry and couch angles. A hard copy of radiographic film is produced (Tsai et al 1991, Engler et al 1994, Drzymala et al 1994. Under most circumstances, the discrepancy between the simulation target centre and the radiation centre would hardly be zero.…”

Section: Introductionmentioning

confidence: 99%

Analyses of multi-irradiation film for system alignments in stereotactic radiotherapy (SRT) and radiosurgery (SRS)

Tsai¹

1996

Phys. Med. Biol.

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In stereotactic radiosurgery, a seven-irradiation film was used to define any discrepancy between the beam and target centres. A mathematical model based on the linac alignment and target set-up was developed to diagnose the discrepancies of the seven-irradiation film between the beam and simulation target centres. From the measured data of the multi-irradiation film, this mathematical model leads to five parameters in seven equations. Twin computer codes were employed to solve the five parameters from the seven equations. By feeding the discrepancy data into the two computer codes, the sources of the target-to-beam discrepancy were revealed. From these decoded sources, the target coordinates were adjusted and then the seven-irradiation film procedure was repeated. This discrepancy thus obtained was found to be drastically reduced. Some decoded parameters were consistently verified by direct measurements. This demonstrates that the present mathematical model and computer code do reveal the causes of the target-to-beam misalignment and gantry sag. In a further effort to test the feasibility of the mathematical model and the computer codes, the target's lateral coordinate was deliberately offset by 1.5 mm and then another seven-irradiation film was taken. By inserting these discrepancies into the computer codes, it was found that the deviation was consistent with the intentional offset. In addition, the mathematical model and computer codes are applicable to any multi-irradiation technique.

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Dosimetric comparison of stereotactic radiosurgery to intensity modulated radiotherapy

Kramer

Wazer

Engler

et al. 1998

Radiat. Oncol. Investig.

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Fine tuning of linear accelerator accessories for stereotactic radiotherapy

Cited by 17 publications

References 17 publications

Technical Note: Evaluation of the systematic accuracy of a frameless, multiple image modality guided, linear accelerator based stereotactic radiosurgery system

Technical Note: Evaluation of the systematic accuracy of a frameless, multiple image modality guided, linear accelerator based stereotactic radiosurgery system

Analyses of multi-irradiation film for system alignments in stereotactic radiotherapy (SRT) and radiosurgery (SRS)

Dosimetric comparison of stereotactic radiosurgery to intensity modulated radiotherapy

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