Growth plate closure: Apex view on bone scan
Angular deformities of the extremities in children following premature closure of the growth plate are well known. The deformities depend on the position of an osseus bridge which forms between the epiphysis and metaphysis. Several surgical procedures including resection of the osseus bridge have been described, however, delineation of the site of fusion is difficult to define. The commonest site of growth plate arrest is the distal femoral or proximal tibial growth plate. A new technique using the bone scan has been developed which accurately defines the area and position of these osseus bridges. Two hours after injection of technetium 99m methylene diphosphonate apex views of the affected distal femoral growth plate were performed. The knee was flexed into its smallest angle. Using a pinhole collimator the gamma camera was angled to face the affected growth plate end on. The image was collected onto computer and analysed by: (I) regions of interest over segments of the growth plate to calculate the relative area of total growth plate affected: (II) generating histograms: (III) thresholding or performing isocontours to accentuate abnormal areas. The growth plate is normally uniformly increased when compared to the normal shaft of the bone. Fusion across the plate appears as an area of diminished uptake. The apex view gives a unique functional map of the growth plate such that abnormal areas are displayed, and the site, size and position of osseus fusion obtained. The technique has the potential for determining the metabolic activity of the growth plate before and after surgery. Serial studies will allow assessment of regneration of the plate and reformation of new osseus bridges.
- Research Organization:
- Royal Alexandra Hospital for Children, Sydney
- OSTI ID:
- 6932415
- Report Number(s):
- CONF-840619-
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 25:5; Conference: 31. annual meeting of the Society of Nuclear Medicine, Los Angeles, CA, USA, 5 Jun 1984
- Country of Publication:
- United States
- Language:
- English
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BONE JOINTS
RADIOISOTOPE SCANNING
TECHNETIUM 99
DIAGNOSTIC USES
TIBIA
BIOLOGICAL REGENERATION
BONE TISSUES
COLLIMATORS
COMPUTER CALCULATIONS
COMPUTER GRAPHICS
IMAGE PROCESSING
INCIDENCE ANGLE
MALFORMATIONS
MAPS
METABOLISM
METHYLENE RADICALS
PHOSPHONATES
SURGERY
UPTAKE
ANIMAL TISSUES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL RECOVERY
BODY
CONNECTIVE TISSUE
COUNTING TECHNIQUES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEDICINE
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANS
PATHOLOGICAL CHANGES
PROCESSING
RADICALS
RADIOISOTOPES
RECOVERY
SKELETON
TECHNETIUM ISOTOPES
TISSUES
USES
YEARS LIVING RADIOISOTOPES
550601* - Medicine- Unsealed Radionuclides in Diagnostics