[Correlation between thyroid volume determined either by ultrasound or by scintigraphy and its implications in dosimetric radioiodine calculations in Graves disease treatment].
BACKGROUND
Graves disease (GD) is the most common cause of hiperthyroidism, and the most common treatment options are surgery, antithyroid drugs and radioiodine therapy. In radiodosimetric calculations to determine radioiodine dosage it is possible to use thyroid volume estimatives based on ultrasound or scintigraphy.


OBJECTIVE
The present study aimed to correlate these methodologies emphasizing volume estimatives and dosimetric implications.


METHODS
Were included 103 patients with GD diagnosis and indication of radioiodine treatment. They were submitted to thyroid ultrasound and thyroid scintigraphy.


CONCLUSIONS
Good correlation between both methods was observed, although scintigraphy systematically obtained greater volumes than ultrasound implying in lower estimatives of absorbed dose when scintigraphy is used.
Serviço de Medicina Nuclear, Instituto de Radiologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
Lucas de Oliveira
Lde O
Vieira
Rodrigo
R
Kubo
Marcelo Tatit
MT
Sapienza
José
J
Willegaignon
Maria Cristina
MC
Chammas
George Barberio
GB
Coura-Filho
Carla Rachel
CR
Ono
Tomoco
T
Watanabe
Heitor Naoki
HN
Sado
Carlos Alberto
CA
Buchpiguel
D000328:Adult; D005260:Female; D006111:Graves Disease / Q000150:complications*; D006801:Humans; D006980:Hyperthyroidism / Q000209:etiology / Q000473:pathology / Q000532:radiotherapy*; D007457:Iodine Radioisotopes / Q000008:administration & dosage*; D008297:Male; D009929:Organ Size; D011446:Prospective Studies; D011877:Radionuclide Imaging; D011879:Radiotherapy Dosage; D013961:Thyroid Gland / Q000000981:diagnostic imaging* / Q000473:pathology; D016896:Treatment Outcome; D014463:Ultrasonography
D007457:Iodine Radioisotopes