Usefulness of 99mTc-pertechnetate single-photon emission computed tomography in remnant mass estimation of postsurgical patients of differentiated thyroid cancer during internal dosimetry

Abstract

Remnant thyroid mass estimation by Tc-99m pertechnetate single-photon emission computed tomography is a simple technique and allows overcoming the dependence on structural imaging techniques or making empirical assumptions during dosimetry.

Thyroid remnant volume and Radioiodine ablation in Differentiated thyroid carcinoma

“…Thyroid remnant volume is one of the predictor of complete ablation (8,9). There are several ways to determine thyroid remnant volume (6). In this study, post-surgery thyroid scan with Single Photon Emission Computed Tomography (SPECT)…”

“…Among these, clinical assumption, surgeon's notes, ultrasonography or plannar scintigraphy is found to be inadequate (6). Tc-99m pertechnitate single photon emission computed tomography (SPECT) showed superior to planar scintigraphy in determination of thyroid remnant volume (6). The aims of this study were to determine the thyroid remnant volume by SPECT scintigraphy and to see the effect of radioiodine ablation on thyroid remnant volume.…”

“…Radioiodine ablation is done to ablate any remaining thyroid tissue, normal or malignant (3,4). Successful ablation depends on type of surgery, thyroid remnant volume, radioactive iodine uptake (RAIU), effective half-life (EHF) of I-131 etc (5,6). There are several studies on thyroid remnant volume and radioiodine ablation (7,8,9).…”

“…There are several studies on thyroid remnant volume and radioiodine ablation (7,8,9). Thyroid remnant can be assessed clinically or by surgeon's notes or by imaging such as ultrasonography or scintigraphy (6). Among these, clinical assumption, surgeon's notes, ultrasonography or plannar scintigraphy is found to be inadequate (6).…”

“…Thyroid remnant can be assessed clinically or by surgeon's notes or by imaging such as ultrasonography or scintigraphy (6). Among these, clinical assumption, surgeon's notes, ultrasonography or plannar scintigraphy is found to be inadequate (6). Tc-99m pertechnitate single photon emission computed tomography (SPECT) showed superior to planar scintigraphy in determination of thyroid remnant volume (6).…”