Optimizing MRI sequences and images for MRI-based stereotactic radiosurgery treatment planning

Taghizadeh, Somayeh; Labuda, Cecille; Yang, Christopher; Morris, Bart; Kanakamedala, M.R.; Vijayakumar, Srinivasan; Rey‐Dios, Roberto; Duggar, William N; Florez, Edward; Fatemi, Ali

doi:10.1016/j.rpor.2018.09.010

Cited by 15 publications

(15 citation statements)

References 12 publications

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“…They reported that distortions depend on the type of MR sequence and on the proximity of the base of the stereotactic headframe to the region of interest. Distortions range from <0.5 mm near the center of the stereotactic space to about 2.0 mm near the base of the headframe 39,54,56–59 . For 3 Tesla MR scanners, larger distortions have been reported, ranging from 1.0 to 4.0 mm 56,60,61 .…”

Section: Treatment Process Quality Assurancementioning

confidence: 99%

“…Distortions range from <0.5 mm near the center of the stereotactic space to about 2.0 mm near the base of the headframe. 39,54,[56][57][58][59] For 3 Tesla MR scanners, larger distortions have been reported, ranging from 1.0 to 4.0 mm. 56,60,61 For cases where significant distortions might be expected in the MR scan (e.g., due to surgical clips), a stereotactic CT scan should be obtained for treatment planning.…”

Section: B1 Imagingmentioning

confidence: 99%

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Recommendations on the practice of calibration, dosimetry, and quality assurance for gamma stereotactic radiosurgery: Report of AAPM Task Group 178

et al. 2021

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The American Association of Physicists in Medicine (AAPM) formed Task Group 178 (TG-178) to perform the following tasks: review in-phantom and in-air calibration protocols for gamma stereotactic radiosurgery (GSR), suggest a dose rate calibration protocol that can be successfully utilized with all gamma stereotactic radiosurgery (GSR) devices, and update quality assurance (QA) protocols in TG-42 (AAPM Report 54, 1995) for static GSR devices. The TG-178 report recommends a GSR dose rate calibration formalism and provides tabulated data to implement it for ionization chambers commonly used in GSR dosimetry. The report also describes routine mechanical, dosimetric, and safety checks for GSR devices, and provides treatment process quality assurance recommendations. Sample worksheets, checklists, and practical suggestions regarding some QA procedures are given in appendices. The overall goal of the report is to make recommendations that help standardize GSR physics practices and promote the safe implementation of GSR technologies.

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Section: Treatment Process Quality Assurancementioning

confidence: 99%

Section: B1 Imagingmentioning

confidence: 99%

Recommendations on the practice of calibration, dosimetry, and quality assurance for gamma stereotactic radiosurgery: Report of AAPM Task Group 178

et al. 2021

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“…A high SNR is beneficial in many ways for SRS treatment. For example, the resulting high-quality MR images allow easy localization of lesions [21, 22]. Alternatively, we can increase the spatial resolution of the image if we maintain the SNR at the level of a single-channel coil [23]; that is, high-resolution brain imaging is possible with multichannel coils at the expense of SNR.…”

Section: Discussionmentioning

confidence: 99%

Development of a Stereotactic Radiosurgery Frame Adapter for a Multichannel MRI Coil

Kim

Chang

Choi

et al. 2020

Stereotact Funct Neurosurg

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Background: The usage of multichannel brain MRI coils, which have several advantages over single-channel brain coils used for stereotactic radiosurgery (SRS), requires a frame adapter device to fit the frames inside the multichannel brain coils. However, such a frame adapter has not been developed until now. Objective: to develop an SRS frame adapter for multichannel MRI coils and verify the geometrical accuracy and signal-to-noise ratio (SNR) of the MR images obtained using multichannel MRI coils. Methods: We fabricated an SRS frame adapter for a 48-channel MRI coil using a three-dimensional (3D) printer. Furthermore, we obtained phantom and human-brain MR images with a 3.0 Tesla MRI scanner using multi- and single-channel coils. Computed tomography (CT) phantom images were also obtained as reference. We compared the coordinate errors of the multi- and single-channel coils to evaluate the geometrical accuracy. Two neurosurgeons measured the coordinates. In addition, we compared the SNR differences between multi- and single-channel coils using the T1- and T2-weighted brain images. Results: For the CT coordinate measurements, the correlation coefficient r = 1 and p < 0.001 with respect to the 3 axes (Δx, Δy, and Δz) and 3D errors (Δr) showed no interpersonal differences between the 2 neurosurgeons. The results obtained using the T1-weighted images showed that a multichannel coil had smaller coordinate errors in Δx, Δy, Δz, and Δr than that observed in case of a single-channel coil (p < 0.001). In case of the SNR measurements, most of the brain areas showed higher SNRs when using a multichannel coil compared with that observed when using a single-channel coil in the T1- and T2-weighted images. Conclusion: Compared with single-channel coils, the use of multichannel MRI coils with a newly developed frame adapter is expected to ensure successful SRS treatments with improved geometrical accuracy and SNR.

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“…As it is performed as provided SMGAN-3D can given high level image quality from the existing denoising networks. Optimizing MRI sequence and images for MRI-based stereotactic radiosurgery treatment planning [4] This paper title present the work done on MRI sequence and processing method on human brain scanning by the direct use of stereotactic radiosurgery(SRS) as it define the noisy or harmful impact cause on body during CT(as ionizing radiation). In this, it revolves around the comparison between CT and SRS technique used by MRI.…”

Section: Literature Surveymentioning

confidence: 99%

Brain Tumor Detection using Image Segmentation Techniques on MRI Images

Sharma*¹,

Marwaha²

2020

IJITEE

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A refine and absolute detection of the human disease can increase the level for the survival of well being. One of the major diseases can be determine as cancer or brain tumor. Different technique used for the tumor detection such as MRI (Medical Resonance Image), Ultrasound etc. It does not involve the X-ray so there are not side effects of MRI. Claustrophobic sensation can occur with MRI scanning because of the close machine with the suffocation and no movement while the scan can increase the time to complete the scanning process while movement can cause the errors or edge distortion. An MRI or magnetic resonance imaging is a radiology technique scan that uses radio waves and with the help of computer to produce images of different body parts. MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet. The magnet creates a strong magnetic field that aligns the protons of hydrogen atoms, which are then exposed to a beam of radio waves. A computer receives the information, which produces an image. MRI is the most accurate and safe method to detect the diseases by detecting the slight change in the body. For the best result various image segmentation techniques and the good edge detection algorithms are used for finding the edge to get the effective images for the examination purpose of medical images.

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Optimizing MRI sequences and images for MRI-based stereotactic radiosurgery treatment planning

Cited by 15 publications

References 12 publications

Recommendations on the practice of calibration, dosimetry, and quality assurance for gamma stereotactic radiosurgery: Report of AAPM Task Group 178

Recommendations on the practice of calibration, dosimetry, and quality assurance for gamma stereotactic radiosurgery: Report of AAPM Task Group 178

Development of a Stereotactic Radiosurgery Frame Adapter for a Multichannel MRI Coil

Brain Tumor Detection using Image Segmentation Techniques on MRI Images

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