A review of permanent marking for radiotherapy in the UK

Townend, C.; Landeg, S.; Thorne, Rick F.; Kirby, Anna M.; McNair, Helen

doi:10.1016/j.radi.2019.08.003

Cited by 17 publications

(13 citation statements)

References 6 publications

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“…Skin tattoo has been applied for patient setup for radiotherapy treatment as the clinical standard because the tattoos are effective to mark, position, and align the patient using room lasers at both treatment simulation and delivery, so the patient can be set up reproducibly 18,27,28 . However, it is not desirable from patient’s point of view because of personal preference, comfortability, and religious concern.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the integrity of the 3D surface is more reliable, unlike skin markers/tattoos that can be moved around by Skin tattoo has been applied for patient setup for radiotherapy treatment as the clinical standard because the tattoos are effective to mark, position, and align the patient using room lasers at both treatment simulation and delivery, so the patient can be set up reproducibly. 18,27,28 However, it is not desirable from patient's point of view because of personal preference, comfortability, and religious concern. With the recent advents in SGRT techniques, a tattoo-free patient setup has been proposed and practiced in some clinics.…”

Section: B | Clinical Benefits For Sgrt-only Setup and Option For Motion Monitoringmentioning

confidence: 99%

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Accuracy of surface‐guided patient setup for conventional radiotherapy of brain and nasopharynx cancer

Lee

Huang

Zhang

et al. 2021

J Applied Clin Med Phys

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To evaluate the accuracy of surface-guided radiotherapy (SGRT) in cranial patient setup by direct comparison between optical surface imaging (OSI) and conebeam computed tomography (CBCT), before applying SGRT-only setup for conventional radiotherapy of brain and nasopharynx cancer. Methods and Materials: Using CBCT as reference, SGRT setup accuracy was examined based on 269 patients (415 treatments) treated with frameless cranial stereotactic radiosurgery (SRS) during 2018-2019. Patients were immobilized in customized head molds and open-face masks and monitored using OSI during treatment. The facial skin area in planning CT was used as OSI region of interest (ROI)for automatic surface alignment and the skull was used as the landmark for automatic CBCT/CT registration. A 6 degrees of freedom (6DOF) couch was used.Immediately after CBCT setup, an OSI verification image was captured, recording the SGRT setup differences. These differences were analyzed in 6DOFs and as a function of isocenter positions away from the anterior surface to assess OSI-ROI bias. The SGRT in-room setup time was estimated and compared with CBCT and orthogonal 2D kilovoltage (2DkV) setups. Results:The SGRT setup difference (magnitude) is found to be 1.0 AE 2.5 mm and 0.1˚AE1.4˚on average among 415 treatments and within 5 mm/3˚with greater than 95% confidence level (P < 0.001). Outliers were observed for very-posterior isocenters: 15 differences (3.6%) are >5.0mm and 9 (2.2%) are >3.0˚. The setup differences show minor correlations (|r| < 0.45) between translational and rotational DOFs and a minor increasing trend (<1.0 mm) in the anterior-to-posterior direction.The SGRT setup time is 0.8 AE 0.3 min, much shorter than CBCT (5 AE 2 min) and 2DkV (2 AE 1 min) setups. Conclusion:This study demonstrates that SGRT has sufficient accuracy for fast inroom patient setup and allows real-time motion monitoring for beam holding during treatment, potentially useful to guide radiotherapy of brain and nasopharynx cancer with standard fractionation.

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Section: Discussionmentioning

confidence: 99%

Section: B | Clinical Benefits For Sgrt-only Setup and Option For Motion Monitoringmentioning

confidence: 99%

Accuracy of surface‐guided patient setup for conventional radiotherapy of brain and nasopharynx cancer

Lee

Huang

Zhang

et al. 2021

J Applied Clin Med Phys

View full text Add to dashboard Cite

show abstract

“…During breast radiotherapy patients are typically immobilised on a breastboard or wingboard with one or both arms raised. Good postural alignment in breast radiotherapy is important as positional discrepancies of the arm can lead to larger interfraction setup deviations at the isocentre [12] , [16] , [9] , [39] . Padilla et al [16] observed subsequent longitudinal shifts.…”

Section: Discussionmentioning

confidence: 99%

“…Typically, an anterior and two lateral tattoos are used as the primary reference for initial patient alignment to ensure reproducibility to the scanned position. In some clinics, additional markings are used to indicate the isocentre or field borders [9] . The quality of the delivered treatments is greatly dependent on the ability to position the patient accurately and reproducibly throughout the course of radiotherapy [10] .…”

Section: Introductionmentioning

confidence: 99%

“…More importantly tattoos do not provide postural information of the arm and chin, which can impact reproducibility and ultimately the target positioning [12] , [19] . Ultraviolet (UV)-visible tattoos as a replacement for dark ink tattoos has been explored however it requires additional time locate these during patient setup [9] , [15] , [18] .…”

Section: Introductionmentioning

confidence: 99%

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