A comparison of daily CT localization to a daily ultrasound-based system in prostate cancer

Lattanzi, Joseph; McNeeley, Shawn; Pinover, Wayne H.; Horwitz, Eric M.; Das, Indra J.; Schultheiss, Timothy E.; Hanks, Gerald E.

doi:10.1016/s0360-3016(98)00496-9

Cited by 243 publications

(113 citation statements)

References 9 publications

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“…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

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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

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“…However, this is an invasive procedure, and assumptions have to be made that the marker does not move relative to the prostate organ, and that the prostate does not change shape or size. Another method to visualize the prostate is with an ultrasound probe 5 . Nevertheless, ultrasound images of prostate are less well defined, may be interpreted differently from CT images, and are not easily applicable for other disease sites.…”

Section: Discussionmentioning

confidence: 99%

“…There have been several attempts to improve on the localization method before treatment. The effort of the radiation oncology community included radio‐opaque implanted markers 4 and ultrasound localization 5 …”

Section: Introductionmentioning

confidence: 99%

Computed tomography localization of radiation treatment delivery versus conventional localization with bony landmarks

Fung

Grimm

Wong

et al. 2003

J Applied Clin Med Phys

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A computed tomography (CT) scanner was installed in the linear accelerator room (Primatom) at Morristown. Since June 2000, we have been providing prostate, lung, and liver cancer patients with fusion of CT and linac radiation treatment. This paper describes our registration methods between planning and treatment CT images, and compares treatment localization by CT versus conventional localization by bony landmarks such as portal imaging. For image registration, we printed out beforehand the beam's eye view of the treatment fields. Prostate tumor volume from each Primatom CT slice was mapped on the printouts, and the necessary isocenter shift relative to the skin marks was deduced. No port film was necessary for our Primatom patients. For ten patients we generated digitally‐reconstructed radiographs (DRRs) with bone contrast from the CT scans, and deduced the required shift as the difference between the DRRs of the Primatom CT versus the planning CT This represented the best observable shift should portal imaging be employed. Shift from bony landmark significantly correlated with the Primatom CT shift. Positioning adjustment based on bony anatomy was generally in the same direction as the CT shift for individual patient, but frequently did not go far enough. Our study confirmed that prostate organ motion relative to the bones has an average length of 4.7 mm (with standard deviation of 2.7 mm), and indicated the superiority of CT versus conventional bony structure (such as portal imaging) localization.PACS number(s): 87.53.Kn, 87.53.–j

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“…In recent years, transabdominal ultrasound systems have been employed to more accurately target the prostate on a daily basis (Lattanzi et al, 1999;Lattanzi et al, 2000;D'Amico et al, 2001). As an alternative, the implantation of small metal seeds into the prostate to serve as fiduciaries during daily portal imaging has also proven reliable as a means of reproducibly localising the prostate (Nederveen et al, 2003).…”

Section: Clinical Applications In Prostate Cancermentioning

confidence: 99%

Intensity-modulated radiation therapy: emerging cancer treatment technology

et al. 2005

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The use of intensity-modulated radiation therapy (IMRT) is rapidly advancing in the field of radiation oncology. Intensity-modulated radiation therapy allows for improved dose conformality, thereby affording the potential to decrease the spectrum of normal tissue toxicities associated with IMRT. Preliminary results with IMRT are quite promising; however, the clinical data is relatively immature and overall patient numbers remain small. High-quality IMRT requires intensive physics support and detailed knowledge of threedimensional anatomy and patterns of tumour spread. This review focuses on basic principles, and highlights the clinical implementation of IMRT in head and neck and prostate cancer.

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A comparison of daily CT localization to a daily ultrasound-based system in prostate cancer

Cited by 243 publications

References 9 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

Computed tomography localization of radiation treatment delivery versus conventional localization with bony landmarks

Intensity-modulated radiation therapy: emerging cancer treatment technology

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