Evaluation of ocular tumors with technetium-99m-MIBI: planar pinhole technique or SPECT?
J Nucl Med Technol
; 28(2): 85-7, 2000 Jun.
Article
en En
| MEDLINE
| ID: mdl-10824618
ABSTRACT
OBJECTIVE:
This study compares 2 imaging protocols, planar pinhole technique (PPHT) and SPECT, for evaluating ocular masses with 99mTc-MIBI.METHODS:
Sixteen patients with ocular lesions were studied. Planar images were acquired 10 min after the injection of 740 MBq 99mTc-MIBI with an LFOV camera fitted with a pinhole collimator (5.0 mm). A SPECT study was performed immediately after the planar study, using a 360 degrees orbit, 64 steps, 20 s/stop, a 128 x 128 matrix, and a low-energy high-resolution (LEHR) collimator. Twelve lesions (9.5-18.0 mm) proved to be malignant 8 primary tumors (ocular melanoma); 3 local relapses of different tumors of the conjunctiva; and 1 ocular metastasis from breast cancer. The remaining 4 lesions (10.0-16.0 mm) were benign 1 inflammatory lesion; 1 benign intraocular calcification; and 2 naevi.RESULTS:
SPECT images showed 11 of 12 malignant lesions (91.6%), whereas the planar technique demonstrated only 4 of the 12 lesions (33.3%). One false-positive result, the inflammatory lesion, was visualized by both techniques. The remaining benign lesions were not detected with either method.CONCLUSION:
Technetium-99m-MIBI SPECT is a sensitive technique for detecting malignant ocular tumors. SPECT imaging is a better alternative to planar imaging for ocular tumors.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cámaras gamma
/
Tomografía Computarizada de Emisión de Fotón Único
/
Tecnecio Tc 99m Sestamibi
/
Radiofármacos
/
Neoplasias del Ojo
Tipo de estudio:
Diagnostic_studies
Límite:
Adolescent
/
Adult
/
Aged
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Aged80
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Nucl Med Technol
Año:
2000
Tipo del documento:
Article