Sonographic guidance for electron boost planning after breast‐conserving surgery

Warszawski, A.; Baumann, Rolf; Karstens, Johann H.

doi:10.1002/jcu.20050

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…An ultrasound monitoring system is a good approach for the in vivo monitoring of target motion, since it involves a noninvasive and nonradioactive scanning process that can operate at a high frame rate. Ultrasound image tracking has been applied at many tumor sites, including the prostate (15) and breast (16). However, ultrasound cannot directly scan a tumor located in the lungs, and so such tumors can only be tracked using indirect positioning.…”

Section: Introductionmentioning

confidence: 99%

Tumor motion tracking based on a four-dimensional computed tomography respiratory motion model driven by an ultrasound tracking technique

Ting

Chuang

Liao

et al. 2020

Quant Imaging Med Surg

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Background: An ultrasound image tracking algorithm (UITA) was combined with four-dimensional computed tomography (4DCT) to create a real-time tumor motion-conversion model. The real-time position of a lung tumor phantom based on the real-time diaphragm motion trajectories detected by ultrasound imaging in the superior-inferior (SI) and medial-lateral (ML) directions were obtained.Methods: Three different tumor motion-conversion models were created using a respiratory motion simulation system (RMSS) combined with 4DCT. The tumor tracking error was verified using cone-beam computed tomography (CBCT). The tumor motion-conversion model was produced by using the UITA to monitor the motion trajectories of the diaphragm phantom in the SI direction, and using 4DCT to monitor the motion trajectories of the tumor phantom in the SI and ML directions over the same time period, to obtain parameters for the motion-conversion model such as the tumor center position and the amplitude and phase ratios.Results: The tumor movement was monitored for 90 s using CBCT to determine the real motion trajectories of the tumor phantom and using ultrasound imaging to simultaneously record the diaphragm movement. The absolute error of the motion trajectories of the real and estimated tumor varied between 0.5 and 2.1 mm in the two directions.Conclusions: This study has demonstrated the feasibility of using ultrasound imaging to track diaphragmatic motion combined with a 4DCT tumor motion-conversion model to track tumor motion in the SI and ML directions. The proposed method makes tracking a lung tumor feasible in real time, including under different breathing conditions.

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Section: Introductionmentioning

confidence: 99%

Tumor motion tracking based on a four-dimensional computed tomography respiratory motion model driven by an ultrasound tracking technique

Ting

Chuang

Liao

et al. 2020

Quant Imaging Med Surg

View full text Add to dashboard Cite

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“…U/S is mainly employed for cavity size and depth determination when radiation has not been significantly delayed after surgery. [ 12 ] Combining the information from surgical clips with CT scans has also been shown to properly determine the tumor bed.…”

Section: Introductionmentioning

confidence: 99%

Discrepancies in determining electron energy for lumpectomy boost treatment

Gloi

Buchanan

2012

J Med Phys

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The aim of this study was to compare lumpectomy cavity depth measurements obtained through ultrasound (U/S) and retrospective computed tomography (CT). Twenty-five patients with stage T1-2 invasive breast cancer formed the cohort of this study. Their U/S and CT measurements were converted into electron energy and compared. The mean U/S depth was 3.6 ± 1.3 cm, while the mean CT depth was 4.9 ± 1.9 cm; the listed error ranges are one standard deviation. Electron energies for treatment ranged from 6 MeV to 12 MeV based on the U/S determination. There was no significant correlation between cavity depths measured by U/S and CT (R2= 0.459, P < 0.002). Furthermore, only 20% of CT-based electron energy determinations matched the corresponding U/S determinations. This ratio increased to 40% when taking into account an upper limit based on the depth of organs at risk below the cavity. The study shows that there is a significant discrepancy between cavity depths determined by U/S and CT. It also supports the concept that post-lumpectomy radiotherapy boosts should be tailored according to the needs and comfort of individual practices and institutions.

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Modern Radiation Therapy Planning and Delivery

Gardner

Kim

Chetty

2019

Hematology/Oncology Clinics of North America

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Sonographic guidance for electron boost planning after breast‐conserving surgery

Abstract: Sonography is a useful and reproducible means of electron boost planning, helping to avoid underdosage of the postoperative cavity and overdosage of normal tissue.

Cited by 6 publications

References 20 publications

Tumor motion tracking based on a four-dimensional computed tomography respiratory motion model driven by an ultrasound tracking technique

Tumor motion tracking based on a four-dimensional computed tomography respiratory motion model driven by an ultrasound tracking technique

Discrepancies in determining electron energy for lumpectomy boost treatment

Modern Radiation Therapy Planning and Delivery

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