CT full spine scan

layered 3D Surface rendered images of CT full spine scan.

Similar expressions

CT whole spine/ CT full spine

Introduction

CT full spine protocol is used to assess spine related fractures and pre surgery planning. It also helps to diagnose spine neoplasms, congenital abnormalities and implant checks.

Patient preparation

  • Explain the examination clearly and kindly.
  • Ask to remove radio opaque items such as hair clips, necklaces, earrings and underclothing related to scanning region.

Patient positioning

  • Position in head-first, supine and in the iso-center.

Explanation: patient in the iso-center reduces radiation exposure and improves image quality.

  • Both hands are raised above the head.

Explanation: this reduces streak artifacts due to hands.

  • Plan the scout start point at nasion and set scan direction inward the gantry.

Scan planning

  • Plan the scan slab to cover from C1 to end of sacrum.
  • Reduce the field of view (FOV) as small as appropriate.

Explanation: smaller FOV increases the geometric resolution of the image.

Planning for CT whole spine scan.

Post-processing

  • Sagittal and coronal images with ≤ 2 mm slice thickness in bone window.
  • Curved multi-planar reconstruction (curved MPR) is useful when there are abnormal curvatures in the spine.
  • Contagious axial slices in bone window (WW: 3500, WL: 350) and soft-tissue window (WW:500,WL:50) with ≤ 2mm and ≤ 3mm slice thicknesses respectively.
  • Pedicle width of vertebrae from C1 to L5 if the purpose of the scan is pre surgical planning for scoliosis correction.
  • Additionally, 3d images to show the full spine.

Reference

  1. Lubdha M. Shah, MD, Chair, Kristine A. Blackham, MD, & Kavita K. Erickson, MD. (2022). ACR–ASNR–ASSR–SPR practice parameter for the performance of computed tomography (CT) of the spine. Retrieved from www.gravitas.acr.org.
  2. Ahn, Tae-Keun & Bourret, Stephane & Thompson, Wendy & Roscop, Cecile & Cloché, Thibault & Lehuec, Jean-Charles. (2020). Full Length Spine CT and MRI. International Journal of Clinical Medicine. 11. 270-281. 10.4236/ijcm.2020.115028.
  3. Sakti YM, Lanodiyu ZA, Ichsantyaridha M, Wijanarko S, Filza MR, Taufan T, Susanto DB, Tampubolon YO, Baskara AANN, Nurshal AA, Mustofa FD, Rosfadilla A, Magetsari R, Rukmoyo T. Pedicle morphometry analysis of main thoracic apex adolescent idiopathic scoliosis. BMC Surg. 2023 Feb 9;23(1):34. doi: 10.1186/s12893-022-01877-5. PMID: 36759804; PMCID: PMC9912543.
  4. Shi H, Zhu L, Ma J, Zhu YC, Wu XT. The accuracy of a novel pedicle screw insertion technique assisted by a special angular scale in the subaxial cervical spine using lateral mass as a reference marker.J Orthop Surg Res. 2020 Nov 23;15(1):551. doi: 10.1186/s13018-020-02054-1. PMID: 33228707; PMCID: PMC7681976.
  5. Menger, R. P., Storey, C. M., Nixon, M. K., Haydel, J., Nanda, A., & Sin, A. (2015). Placement of C1 Pedicle Screws Using Minimal Exposure: Radiographic, Clinical, and Literature Validation. International journal of spine surgery, 9, 43. https://doi.org/10.14444/2043 
  6. Romanyukha, A., Nzitunga, P. S., & Dolcet, A. (2022, April 28). CT patient positioning plays key role in radiation dose reduction.www.auntminnie.com.