Comparison of ultrasound and implanted seed marker prostate localization methods: Implications for image-guided radiotherapy

Scarbrough, Todd J.; Golden, Nanialei M.; Ting, Joseph; Fuller, Clifton D.; Wong, Angelique; Kupelian, Patrick A.; Thomas, Charles R.

doi:10.1016/j.ijrobp.2006.01.008

Cited by 139 publications

(78 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The use of ultrasound in imaging the prostate has been studied but its value remains controversial. (4,5,6,7,8,9,10). The issues yet to be clarified are the differences between the ultrasound image and the CT image in determining the prostate anatomy and the possibility that the pressure of the probe shifts the prostate position between alignment and treatment.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of the Use of Bony Anatomy and Internal Markers for Offline Verification and an Evaluation of the Potential Benefit of Online and Offline Verification Protocols for Prostate Radiotherapy

McNair

Hansen

Parker

et al. 2008

International Journal of Radiation Oncology*Biology*Physics

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A Comparison of the Use of Bony Anatomy and Internal Markers for Offline Verification and an Evaluation of the Potential Benefit of Online and Offline Verification Protocols for Prostate Radiotherapy

McNair

Hansen

Parker

et al. 2008

International Journal of Radiation Oncology*Biology*Physics

View full text Add to dashboard Cite

“…respectively [6]. In the current prospective study of daily KV CBCT as part of a rescan protocol, both the mean displacement of the inter-fractional motion and the rate of <5 mm inter-fractional motion of the prostate were better than those in the previous studies (Table 3), thus indicating this protocol to be promising for improving radiation therapy.…”

Section: Discussionmentioning

confidence: 51%

Efficacy of Daily Cone-Beam Computed Tomography as Part of a Rescan Protocol for Large Offset to Reduce the Inter-Fractional Motion of the Prostate

Yamaguchi¹,

Ohguri²,

Imada³

et al. 2014

IJMPCERO

View full text Add to dashboard Cite

Purpose: To prospectively analyze the inter-fractional motion of the prostate in patients with prostate cancer treated with intensity-modulated radiation therapy (IMRT) using image-guided radiotherapy (IGRT) with daily cone-beam computed tomography (CBCT) as part of a rescan protocol for large offset, and to evaluate the efficacy of our protocol. Materials and Methods: Eligible patients were treated with the following protocol: 1) magnesium oxide and dimethylpolysiloxane were administered to ensure that patients had regular bowel movements; 2) the patients were instructed to have an appropriately distended bladder during the planning CT and daily irradiation; 3) the daily CBCT image was fused with the planning CT image using the prostate outline; and 4) if large offset was recognized, a rescan CBCT image was obtained after appropriate countermeasures, such as the discharge of gas and defecation, and re-registration was performed. Three shifts for the inter-fractional motion of the prostate were analyzed, in the fractions which needed the CBCT rescan; the displacement data after the final rescan were used. Results: Sixty-one patients were eligible, and a total of 2302 fractions were available for the analysis. Rescans of the CBCT for large offset were performed in 113 (5%) of the 2302 fractions. After the first rescan, the large offset was resolved in 106 (94%) of the 113 fractions. Excessive rectal gas was the reason for the large offset in 94 (83%) of the 113 fractions. The total mean and standard deviation of the inter-fractional motion of the prostate in the AP, LR, and SI directions were 1.1 ± 2.4, −0.1 ± 2.3, and 0.7 ± 3.0 mm, respectively. Conclusion: Large offset was recognized in 5% of all fractions. Daily * Corresponding author. S. Yamaguchi et al. 194CBCT with our rescan protocol could resolve the large offset, which was mainly caused by excessive rectal gas, and it may therefore be promising to reduce the inter-fractional motion of the prostate.

show abstract

“…Similar recommendation was made by Kroll's study from which better visualization of salivary gland could be achieved by using CBCT as an adjunct to US [19]. One of the feasible workflow would be using US for initial setup to reduce the positioning time and verified by CBCT or other X-ray system [20]. One limitation of this study was the patient size which served as the further goal to increase the sample size from which a population-based margin for kidney diseases could be established.…”

Section: Fargier Et Al Compared the Inter-observer Variations Of Tramentioning

confidence: 79%

A Technical Note: Inter-Observer and Inter-Modality Variability of Cone-Beam Computed Tomography (CBCT) and Ultrasound (US) in Stereotactic Body Radiotherapy for Kidney Cancer

Leung¹,

Wong²,

Lee³

et al. 2017

IJMPCERO

View full text Add to dashboard Cite

Introduction: To investigate the inter-observer and inter-modality variabilities of two imaging guided equipments-cone-beam computed tomography (CBCT) and ultrasound (US) in kidney stereotactic body radiotherapy. Methods: A renal metastasis case implanted with three gold anchor fiducial markers was firstly scanned by US to acquire a 3-dimension US image and followed by 4-dimension CBCT in every fraction. Seven observers retrospectively registered the pre-treatment images with the corresponding reference images based on the gold markers. Registration uncertainty of the observers between two imaging modalities was evaluated. Results: The uncertainties over whole treatment course in CBCT were 0.88 mm, 1.94 mm and 0.86 mm in lateral, longitudinal and vertical directions respectively; while 0.8 mm, 0.97 mm and 1.36 mm were found in US.

show abstract

Comparison of ultrasound and implanted seed marker prostate localization methods: Implications for image-guided radiotherapy

Cited by 139 publications

References 22 publications

A Comparison of the Use of Bony Anatomy and Internal Markers for Offline Verification and an Evaluation of the Potential Benefit of Online and Offline Verification Protocols for Prostate Radiotherapy

A Comparison of the Use of Bony Anatomy and Internal Markers for Offline Verification and an Evaluation of the Potential Benefit of Online and Offline Verification Protocols for Prostate Radiotherapy

Efficacy of Daily Cone-Beam Computed Tomography as Part of a Rescan Protocol for Large Offset to Reduce the Inter-Fractional Motion of the Prostate

A Technical Note: Inter-Observer and Inter-Modality Variability of Cone-Beam Computed Tomography (CBCT) and Ultrasound (US) in Stereotactic Body Radiotherapy for Kidney Cancer

Contact Info

Product

Resources

About