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Ingenia 1.5T MR-RT Cervix for RT planning - UMC Utrecht

ExamCard
Philippens, Marielle, Dr. Ir. UMC Utrecht • Netherlands

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ExamCard description

This R5.1.7 ExamCard for Ingenia 1.5T MR-RT is applied for RT planning in patients with cervical cancer referred for external beam radiotherapy.  

 

Three MRI scan with different bladder filling are made: half full (mid), empty and full bladder.

ExamCard overview

 

Sagittal T2w TSE is done because cervical tumors show an intermediate to high signal on T2-weighted MR images.

 

Axial T2w TSE and Coronal T2w TSE orientations are used to delineate the CTV including uterus, parametria and vagina and to distinguish all interfaces with organs at risk, such as, rectum, bladder, bowel, sigmoid. Also spinal cord, kidneys, femoral heads are delineated on the T2-weighted MR images.

 

On PDw TSE is performed as enlarged para-aortic lymph nodes can be distinguished using a proton density weighted scan from pubic bone up to the diaphragm.

 

DWI/ADC is done because cervical tumors show a high signal intensity on heavily diffusion weighted scans and can be used to assess the residual tumor after neoadjuvant external beam radiotherapy. A DWI can also be used to help visualize lymph nodes, although also benign lymph nodes will be found.

ExamCard images

Click on an image to enlarge
Sagittal T2w TSE mid Scan time 1:48 min.<br>
Voxels 0.9 x 0.7 x 3.0 mmAxial T2w TSE mid Scan time 4:40 min.<br>
Voxels 1.3 x 0.9 x 3.0 mmCoronal T2w TSE mid Scan time 2:58 min.<br>
Voxels 0.8 x 0.7 x 4.0 mm
Sagittal T2w TSE mid
Axial T2w TSE mid
Coronal T2w TSE mid
Scan time 1:48 min.
Voxels 0.9 x 0.7 x 3.0 mm
Scan time 4:40 min.
Voxels 1.3 x 0.9 x 3.0 mm
Scan time 2:58 min.
Voxels 0.8 x 0.7 x 4.0 mm
Axial PDw TSE mid Scan time 2:20 min.<br>
Voxels 2.1 x 1.1 x 6.0 mm<brAxial DWI SPAIR mid b800 Scan time 4:07 min.<br>
Voxels 2.5 x 2.3 x 4.0 mm<brAxial DWI ADC Scan time 4:07 min.<br>
Voxels 2.5 x 2.3 x 4.0 mm<br
Axial PDw TSE mid
Axial DWI SPAIR mid b800
Axial DWI ADC
Scan time 2:20 min.
Voxels 2.1 x 1.1 x 6.0 mm
Scan time 4:07 min.
Voxels 2.5 x 2.3 x 4.0 mm
Scan time 4:07 min.
Voxels 2.5 x 2.3 x 4.0 mm
Sagittal T2w TSE empty bladder Scan time 1:48 min.<br>
Voxels 0.9 x 0.7 x 3.0 mmAxial T2w TSE mid Scan time 4:40 min.<br>
Voxels 1.3 x 0.9 x 3.0 mmCoronal T2w TSE mid Scan time 2:58 min.<br>
Voxels 0.8 x 0.7 x 4.0 mm
Sagittal T2w TSE empty bladder
Axial T2w TSE mid
Coronal T2w TSE mid
Scan time 1:48 min.
Voxels 0.9 x 0.7 x 3.0 mm
Scan time 4:40 min.
Voxels 1.3 x 0.9 x 3.0 mm
Scan time 2:58 min.
Voxels 0.8 x 0.7 x 4.0 mm
Sagittal T2w TSE full bladder Scan time 1:48 min.<br>
Voxels 0.9 x 0.7 x 3.0 mm
Sagittal T2w TSE full bladder
Scan time 1:48 min.
Voxels 0.9 x 0.7 x 3.0 mm

Patient preparation

Patients are imaged in radiotherapy position on a flat couchtop with arms in abduction. As the position of cervix and uterus depends upon how full the bladder is, several treatment plans are made based on the MRI images with different bladder filling: empty, half-full (mid) and full.

 

 



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Oct 23, 2017

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ExamCard
Ingenia MR-RT
Release 5
Body, Cervix, dStream, EBRT, MRI simulation, MR-RT, Oncology, Pelvis, radiation oncology, radiation therapy, RT planning
 

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