A comparison between two different immobilization devices for radiation therapy treatment of pelvic cancer using VMAT

Mulla, Zaheeda; Hashem, Rania; AlMohamad, Abdullah; Boubakra, T.; Almerdhemah, Hussain; Kunjappan, Anila; Jastaniah, Z.

doi:10.1016/j.jmir.2021.02.008

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…All shifts were computed by shifting the treatment couch. The shifts defined as setup errors were recorded and analyzed by systematic and random errors as described previously 7 through the 6 directions (lateral, vertical, and longitudinal, and X, Y, and Z rotational axes).…”

Section: Methodsmentioning

confidence: 99%

“… 6 In a study conducted by the authors, 2 different immobilization devices for RT treatment of pelvic cancer were compared, and gynecologic tumors and obesity were determined to be associated with greater setup errors in translational directions. 7 Subsequently, the authors turned their focus on gynecologic tumors to determine the magnitude of setup displacement in relation to body mass factors (BMFs) and its effect on the aforementioned target volumes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Body Mass Factors on Setup Displacement in Gynecologic Tumors and Subsequent Effect on PTV Margins

Mulla

Hashem

AlMohamad

et al. 2023

Advances in Radiation Oncology

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Body Mass Factors on Setup Displacement in Gynecologic Tumors and Subsequent Effect on PTV Margins

Mulla

Hashem

AlMohamad

et al. 2023

Advances in Radiation Oncology

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“…1 Due to improved surveillance and innovations in treatment, early detection of cancer and effective treatment options have become more readily available. 2,3 This has resulted in increasing survival rates for pelvic malignancies. 1 innovation, radiation therapy (RT), has become an integral part of standard treatment for >60% of all cancers.…”

Section: Introductionmentioning

confidence: 99%

Previous external beam radiation therapy for pelvic malignancy increases complications of total hip arthroplasty

Pondugula,

Spiering,

Parel

et al. 2023

HIP International

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Introduction: External beam radiation therapy (EBRT) has known effects on bone health. No large database studies have looked at the effects of pelvic EBRT on total hip arthroplasty (THA) outcomes. The purpose of this study was to evaluate 90-day and long-term (>2 years) complication rates following THA in patients with a history of pelvic malignancy and EBRT. Methods: Patients were retrospectively identified using a national insurance claims database. Subjects who underwent THA for osteoarthritis or avascular necrosis were included if they had at least 2-year follow-up and were stratified into 3 cohorts: (1) prior pelvic malignancy diagnosis (prostate, cervical, uterine, ovarian, or rectal) and EBRT (Group A); (2) prior malignancy diagnosis but no EBRT (Group B); and (3) neither prior malignancy diagnosis nor EBRT (Group C). Univariate and multivariate analyses were conducted to evaluate for an association between prior EBRT and the incidence of 90-day and 2-year complication rates using chi-square, student t-tests, and logistic regression analyses where appropriate. Results: 671,554 patients met the inclusion criteria. Group A had higher odds of all-cause revision, septic revision, and loosening with revision after 2 years when compared to Group C and Group B ( p < 0.001). Group A subjects had higher rates of 90-day deep vein thrombosis, sepsis, and stroke ( p < 0.001) than groups B and C. Conclusions: Prior EBRT for pelvic malignancy was associated with significantly increased rates of all-cause revision, septic revision, and loosening as well as 90-day medical complications.

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Comparison of setup errors between two immobilization techniques for image-guided pelvic radiotherapy: Can an ankle fixator be used as an alternative to a thermoplastic mask for immobilization without compromising treatment?

Ghosh,

Roy,

Chhatui

et al. 2024

ASJO

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Objectives Pelvic malignancies have reported large setup variations, requiring good treatment positioning and immobilization. Various immobilization techniques have been reported in literature for pelvic malignancies. In this study, two different immobilization techniques have been compared for translational setup errors during radiation delivery. Material and Methods Kilovoltage cone-beam computed tomography (kV CBCT) scans were taken and 3D-3D matching was done during the first three days of radiation treatment; thereafter once a week, and as per requirement of the particular treatment. Data on translational shifts was tabulated from treatment record. The mean and standard deviation of all individual shifts were calculated using descriptive statistics. The means of the translational shifts of the two arms were compared using Mann–Whitney U test. The population’s systematic and random errors were calculated. Clinical target volume to planning target volume (CTV-PTV) margins were calculated using Van Herk’s method. Results A total of 855 cone-beam computed tomography (CBCT) scans were analyzed. The mean setup errors were not significantly different between two arms in all three translational axes. The CTV-PTV margins in the anteroposterior, superoinferior, and lateral directions are 0.59, 0.94, and 0.78 cm for the TPI arm and 0.84, 0.92, and 0.87 cm for the AFI arm. To have a uniform CTV-PTV margin in all directions, the minimum expansion required is 0.94 cm and 0.92 cm in the TPI and AFI arm, respectively. Conclusion An ankle fixator or similar lower leg immobilization technique can be used as an alternative to thermoplastic mask immobilization without compromising setup accuracy. This has the potential to reduce treatment cost per patient, by excluding the cost of thermoplastic mask.

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A comparison between two different immobilization devices for radiation therapy treatment of pelvic cancer using VMAT

Cited by 3 publications

References 16 publications

Effect of Body Mass Factors on Setup Displacement in Gynecologic Tumors and Subsequent Effect on PTV Margins

Effect of Body Mass Factors on Setup Displacement in Gynecologic Tumors and Subsequent Effect on PTV Margins

Previous external beam radiation therapy for pelvic malignancy increases complications of total hip arthroplasty

Comparison of setup errors between two immobilization techniques for image-guided pelvic radiotherapy: Can an ankle fixator be used as an alternative to a thermoplastic mask for immobilization without compromising treatment?

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