Preparing for Tremor Treatment with Ultrasound: How to Perform a CT?

Dmitrij Krekotin

Content

Patient

  1. Show this page to the MRI-technician. Note that you need a SPECIAL CT scan. The scanning mode must provide the necessary information without distortion for calculating the treatment of tremor with focused ultrasound!
  2. Create a folder on the desktop and copy all the contents of the disk containing the CT scan results into it.
  3. Then the folder should be archived (compressed) using an archiver zip или 7- zip and send it to us by email at mri.imcb@gmail.com or through a file-sharing service like Mail.ru Cloud, Yandex Disk or Google Drive

Healthcare Professional

Compatible CT Machines

For performing MRI-guided focused ultrasound surgery on a neurosurgical platform ExAblate Neuro 4000 CT and MRI image fusion is required. For this, the CT of the cranial bones must be performed exclusively on compatible CT equipment.

  • General Electric (all models): BONEPLUS
  • Toshiba (all models): FC30
  • Siemens (Somatom Sensation, Siemens Somatom Emotion, Siemens Somatom Scope, Siemens Definition AS): H60s or H60f

CT Protocol

DO NOT APPLY any enhancement filters on CT images if they are intended for use in neurosurgical MRgFUS procedures (MRI-guideded focused ultrasound ablation)
A strong request not to apply the extended filter UEO, all images in FC30 RAW (any models), as well as other enhancing filters for CT (smoothing, noise reduction, and similar).

Gantry CT: there should be no tilt

Slice thickness: between 0.5 and 1.25 mm. The same slice thickness across the entire scanning area (in one slab)
Uniform distance between slice thicknesses: 0 mm
Permission : 512×512
Contrast : No
Coverage : Complete
The scanning program MUST cover the entire skull (not limited to the target area). Please ensure that the top slice is above the skull (in the air) and the bottom slice reaches the base of the skull.
Orientation : It is advisable to align axial CT images along the plane AC-PC and perpendicular to the midline.

Ready to answer your questions about WhatsApp: +79177742004 (radiologist

Patient Position and Slices

CT scan protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: patient positioning on the CT table
CT scan protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: CT scan area
CT protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: determination of anterior points AC and the posterior commissure PC
CT protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: AC-PC Plane
CT scan protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: AC-PC with slice positioning
CT Protocol for Preliminary Planning of Tremor or Parkinson’s Disease Treatment Using MRI-guided Focused Ultrasound: Plane AC-PC with lines of all slices
CT protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: determination of the anterior AC) and posterior ( PC) commissure on MRI
CT protocol for preliminary planning of tremor or Parkinson’s disease treatment using MRI-guided focused ultrasound: plane AC-PC by MRI

How to set up your CT scanner to obtain images for preliminary planning of MRgFUS treatment for tremor?

Philips CT Scanner: How to Perform a Scan for Planning Treatment with Focused Ultrasound?

CT scanner General Electric: how to conduct scanning for planning treatment with focused ultrasound?

CT scanner Siemens: how to perform scanning for planning treatment with focused ultrasound?

Siemens Syngo DISABLE option SAFIRE!

Siemens – H60

Siemens Syngo (new)

CT scanner Toshiba: how to perform scanning for planning treatment with focused ultrasound?

  1. All actions are performed on the scanning monitor (operator console), the first action is selecting the required patient.

2. Second action – you need to press ‘Raw-data’ (processing of initial data). Each photo is marked with a cursor indicating where to click

3. Next, if necessary, change the slice thickness.

4. Read more Kernel, at the finish, press

“Reconstrucrion” (bottom left corner of the screen)

Dmitrij Krekotin

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