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The effect of myelography dye on bone density measurements utilizing Hounsfield units on CT.
Weegens, Ryan; Crawford, Charles H; Glassman, Steven D; Dimar, John R; Gum, Jeffrey L; Carreon, Leah Y.
Afiliación
  • Weegens R; 1Department of Orthopaedic Surgery, University of Louisville School of Medicine.
  • Crawford CH; 1Department of Orthopaedic Surgery, University of Louisville School of Medicine.
  • Glassman SD; 2Norton Leatherman Spine Center, Louisville, Kentucky.
  • Dimar JR; 1Department of Orthopaedic Surgery, University of Louisville School of Medicine.
  • Gum JL; 2Norton Leatherman Spine Center, Louisville, Kentucky.
  • Carreon LY; 1Department of Orthopaedic Surgery, University of Louisville School of Medicine.
J Neurosurg Spine ; 40(4): 513-518, 2024 Apr 01.
Article en En | MEDLINE | ID: mdl-38215447
ABSTRACT

OBJECTIVE:

Hounsfield unit (HU) measurements of bone density on CT are increasingly used for preoperative planning in spine surgery. Postmyelogram CT is another common preoperative diagnostic study. However, there is no current literature evaluating whether HU measurements on CT are affected by the presence of myelography dye. The purpose of the current study was to determine if the presence of myelography dye affects HU measurements of bone density in CT studies.

METHODS:

Twenty-nine preoperative spine surgery patients who underwent both standard and postmyelography CT performed within 6 months of each other were identified. HU measurements were obtained from an elliptical region of interest using the available software on a standard PACS. Measurements were obtained on the axial cut at the midvertebral body on all lumbar vertebrae on three separate occasions and an average value was calculated for comparative analysis. A 6-week gap was used between measurements of the CT scans and the CT myelograms to diminish bias.

RESULTS:

The mean age of the cohort was 69 years and the average BMI was 32 kg/m2. Five patients were male and 24 were female. Six of the patients had instrumentation placed prior to the initial CT scan. The average HU measurements for CT levels L1-5 were 165, 171, 145, 154, and 225, respectively, whereas HU measurements for CT myelography of levels L1-5 were 168, 177, 148, 170, and 239, respectively. Strong correlations were noted between the HU measured on CT and CT myelography for L1 (r2 = 0.951), L2 (r2 = 0.966), L4 (r2 = 0.820), and L5 (r2 = 0.900), and moderate for L3 (r2 = 0.668).

CONCLUSIONS:

The presence of myelography dye had no clear effect on CT HU measurements of bone density. The results of this study support the use of CT myelograms for bone density assessment in the absence of standard CT images.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoporosis / Densidad Ósea Límite: Aged / Female / Humans / Male Idioma: En Revista: J Neurosurg Spine Asunto de la revista: NEUROCIRURGIA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoporosis / Densidad Ósea Límite: Aged / Female / Humans / Male Idioma: En Revista: J Neurosurg Spine Asunto de la revista: NEUROCIRURGIA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos