Samenvatting
RATIONALE AND OBJECTIVES: The accuracy of the measurement of the size of cortical bone on computed tomography (CT) images of human vertebrae was evaluated using an automated contour detection and segmentation procedure.
METHODS: Forty human lumbar vertebrae were scanned using 8-mm slices and an automated detection for definition of trabecular and cortical region of interest. The vertebrae were embedded in a polyester resin and 8-mm-thick midvertebral specimens were excised using a diamond circular saw. Contact radiographs of these specimens were performed and, after photograph magnification, the cortical area was measured using computerized planimetry.
RESULTS: Cortical area measured on CT images was highly correlated with the area measured by planimetry on the specimens (r = .91; P < .001) with, however, a systematic over-estimation. A significant relationship was found between density and width of the cortex (r = .56; P < .001).
CONCLUSIONS: Computed tomography is able to assess the size of cortical bone in human vertebrae, but a threshold detection algorithm, as used in the current study, is not adequate to obtain the precise anatomic dimensions.
Originele taal-2 | English |
---|---|
Pagina's (van-tot) | 802-805 |
Aantal pagina's | 4 |
Tijdschrift | Investigative Radiology |
Volume | 28 |
Nummer van het tijdschrift | 9 |
Status | Published - sep 1993 |
Keywords
- Aged
- Aged, 80 and over
- Bone Density
- Bone and Bones
- Female
- Humans
- Male
- Tomography, X-Ray Computed