No abstract available.
Radionuclide Imaging* ; Sodium Pertechnetate Tc 99m* ; Thyroid Gland* ; Thyroid Neoplasms*

Ectopic thyroid is not common disease and double ectopic thyroid is rare. Until January of 2008, dual ectopic thyroid has been reported only 23 cases in international literatures. Tc-99m sodium pertechnetate scan is playing an important role in the diagnosis of ectopic thyroid. In most of the cases, dual lingual thyroid tissues could be detected as two radiotracer uptake foci. We report a case of dual lingual thyroid mimicking mono-lingual thyroid in the anterior view of thyroid scan. Lateral view helped in this case to detect the dual lingual thyroid. With lateral view, the anatomical position and relationship could be examined in more detail.
Lingual Thyroid ; Sodium ; Sodium Pertechnetate Tc 99m ; Thyroid Dysgenesis ; Thyroid Gland

In order to evaluate the influence of soft contact lens(SCL) on the tear turnover rate in the conjunctival sac with SCL, this study was performed with lacrimal scintillography. Two determinations were carried out in the same eye: the first determination was carried out in both eyes without SCL(control group) and the second determination was carried out in both eyes after adaptation to the SCL from 4 hours to 8 hours only in the left eye(study group). In the results, there was no statistical difference of the fractional turnover rate of the tear between both eyes without SCL. In left eyes, the fractional tunover rate of the study group was significantly lower than that of the control group, because the accumulation of the Technetium 99m sodium pertechnetate in the SCL. In right eyes, there was no statistical difference of the fractional turnover rate of the tear between the control group and the study group. This result may be derived from 'fatigue block' and/or the decreased sensitivity of the cornea fitted with SCL.
Contact Lenses, Hydrophilic* ; Cornea ; Sodium ; Sodium Pertechnetate Tc 99m ; Tears* ; Technetium

PURPOSE: To evaluate the radiologic findings and detectability of parathyroid masses in ultrasonograph computed tomography(CT), and radionuclide study(201TI-99mTc pertechnetate subtraction scintigraphy). MATERIALS AND METHODS: Surgically-proven 11 cases with parathyroid masses consisted of adenoma(n=8), adenomatous hyperplasia(n:2) and adenocarcinoma(n:l) were retrospectively analyzed. We performed US in all cases, CT in 8 cases, and radionuclide study in 7 cases. The parathyroid masses were analysed in regard to anatomic localization and imaging appearance on three modalities. RESULTS: Ten of the 11 parathyroid masses(91%) were located posterior to the thyroid gland and the remainder in the left superior mediastinum. Nine of the 11 cases(82%) were detected on US. The majority were well-defined hypoechoic mass on US. Six of the 8 cases(75%) were detected on CT scan. In the precontrst CT, all of the 8 masses were hypodense as compared with thyroid gland and most showed mild enhancement on post-contrast CT. Six of the 7 cases(86%) were detected on RI study as hot nodule. CONCLUSION: The typical radiological findings of the parathyroid mass were well-defined ovoid or round hypoechoic mass on US, hypodense mass with variable contrast enhancement on CT, and hot nodule on radionuclide study. US was a convenient and reliable imaging modality in detecting parathyroid masses. Improved diagnostic accuracy could be achieved with complementary CT scan and radionuclide study in addition to ultrasonography.
Mediastinum ; Retrospective Studies ; Sodium Pertechnetate Tc 99m ; Thyroid Gland ; Tomography, X-Ray Computed ; Ultrasonography

To determine whether are significant diastolic left ventricular dysfunctions in mild to moderate hypertensive patients with normal systolic function, radionuclide ventriculography by in vivo red cell labelling technique using 20 mCi of (99m)Tc pertechnetate was performed in 24 hypertensive patients(mean age: 50.6+/-12.4, mean blood pressure: 156.9+/-11.8/100.6+/-7.1 mmHg) and in 11 normal subjects (mean age: 42.7+/-13.5, mean blood pressure: 123.2+/-6.8/82.3+/-3.9 mmHg). The results were as follows: 1) Ejection fraction was similar in both hypertensive and control groups (0.70+/-0.06 versus 0.70+/-0.08). 2) Mean of the peak filling rate (PFR) was significantly lower in hypertensive group (2.07+/-0.45 EDV/sec) than in control group (2.42+/-0.30 EDV/sec) (p<0.05). 3) Mean of the time to peak diastolic filling (TPDF) in hypertensive patients was 189.0+/-30.4 msec and which was significantly longer than that of control subjects (164.5+/-22.4 msec)(p<0.02). 4) Mean of the first third filling fraction (1/3 FF) in hypertensive patients was 0.22+/-0.07 and which was significantly lower than that of control subjects (0.32+/-0.09)(p<0.01). 5) Decreased PFR and delayed TPDF were also demonstrated with advances in age in both groups. Above results suggest that the diastolic evaluation of left ventricle might be necessary in the hypertensive patients with normal systolic function, and that diastolic dysfunction may precede the systolic dysfunction and clinical deterioration.
Blood Pressure ; Heart Ventricles ; Humans ; Hypertension* ; Radionuclide Ventriculography* ; Sodium Pertechnetate Tc 99m ; Ventricular Dysfunction, Left

Two cases of Bleeding Meckel's Diverticulum Using (99m)Technetium-Pertechnetate Scanning are presented. (99m)TC-pertechnetate was used in the diagnosis of Meckel's Diverticulum by Jewette et al in 1970 for the first time. The affinity of this isotope for the parietal cell of the gastric mucosa makes it ideal for delincating ectopic gastric tissue. It noninvasiveness can be used in early screening test of occult gastrointestinal bleeding in pediatric age group.
Diagnosis* ; Gastric Mucosa ; Hemorrhage* ; Humans ; Mass Screening ; Meckel Diverticulum* ; Rabeprazole ; Sodium Pertechnetate Tc 99m*

PURPOSE: To evaluate diagnostic sensitivity of nuclear imaging in the detection of residual thyroid tissue and metastatic lesion, we have compared neck scintigrams with Tc-99m pertechnetate (Tc-99m scan) and high dose I-131 iodide (I-131 scan) in patients with differentiated thyroid cancer. SUBJECTS AND METHODS: One hundred thirty-five thyroidectomized patients for differentiated thyroid cancer were enrolled in this study. Twenty-three had a previous history of radioiodine therapy. Planar and pin-hole images of anterior neck with Tc-99m were acquired at 20 minutes after injection, followed by I-131 scan three days after high-dose radioiodine therapy within 7 days interval. Patients were asked to discontinue thyroid hormone replacement more than 4 weeks. RESULTS: All subjects were in hypothyroid state. Seventy out of 135 patients (51.9%) showed concordant findings between Tc-99m and I-131 scans. I-131 scan showed higher number of uptake foci in all of 65 patients showing discordant finding. Tc-99m scan showed no thyroid bed uptake in 34 patients, whereas 23 of them (67.6%) showed bed uptake in I-131 scan. Tc-99m scan did not show any uptake in thyroid bed in 11 of 112 patients without previous history of radioiodine therapy, but 9 of them showed bed uptake in I-131 scan. Tc-99m scan showed no bed uptake in all of the 23 patients with previous history of radioiodine therapy, in contrast 14 of them (60.9%) showed bed uptake in I-131 scan. CONCLUSION: These results suggest that Tc-99m scan has poor detectability for residual thyroid tissue or metastatic lesion in thyroidectomized differentiated thyroid cancer patients, compared to high dose I-131 therapy scan. Tc-99m scan could not detect any remnant tissue or metastatic lesion in patients with previous history of radioiodine treatment, especially.
Humans ; Neck ; Neoplasm Metastasis ; Sodium Pertechnetate Tc 99m* ; Thyroid Gland* ; Thyroid Neoplasms* ; Thyroidectomy*

Thyroid hemiagenesis is a rare congenital anomaly in which one thyroid lobe fails to develop. Thyroid hemiagenesis usually does not cause clinical symptoms by itself, therefore, this anomaly is detected incidentally during the evaluation of other thyroid disorders. We describe a rare case of thyroid hemiagenesis in a 1-month-old female infant who presented with prolonged jaundice and abnormal laboratory findings of congenital hypothyroidism. The patient showed the characteristic features of thyroid hemiagenesis of the left lobe in Tc-99m pertechnetate scintigraphy and ultrasonography of the thyroid gland. The patient has improved with supportive care, including thyroid hormone replacement. Further long-term follow-up is required for the investigation of recurrence of thyroid abnormalities.
Congenital Hypothyroidism ; Female ; Humans ; Hypothyroidism ; Infant ; Infant, Newborn ; Jaundice ; Recurrence ; Sodium Pertechnetate Tc 99m ; Thyroid Gland

Planar scintigraphy using Tc-99mpertechnetate is useful for snapshot evaluation of hot thyroid nodules, which are pathologically follicular adenoma and seldom, if ever, malignant. The autonomy of the hot nodules has been demonstrated by the presence of thyroid-stimulating hormone-dependent extra-nodular thyroid tissue besides the hot nodules. Here, we present two cases of hot thyroid nodules in patients who underwent quantitative single-photon emission computed tomography/computed tomography (SPECT/CT). In addition to the nodules, contralateral normal thyroid parenchyma was evaluated based on standardized uptake values. One patient had a traditional follicular adenoma suppressing other thyroid tissue, whereas the other patient seemed to have a nodule erupting from underlying hyperfunctioning, not suppressed, thyroid tissue. This novel approach using quantitative SPECT/CT unveils a new pathology of hot thyroid nodule that does not suppress, but coincides with hyperfunctioning thyroid tissue.
Adenoma ; Humans ; Pathology ; Radionuclide Imaging ; Sodium Pertechnetate Tc 99m ; Thyroid Gland ; Thyroid Nodule

BACKGROUND: Parkinson's disease (PD) often presents with various types of autonomic dysfunction. Sialorrhea is frequently reported in patients with idiopathic PD. The present study was performed to compare the salivary function and severity of idiopathic PD between a patients with PD group and an age-matched control group, using salivary scintigraphy. METHODS: Twenty patients with idiopathic PD and fourteen age-matched controls were studied. Each subject received 7 mCi of 99mTc sodium pertechnetate intravenously. Sequential salivary scintigraphy was taken for 50 minutes. For the analysis of glandular function, we measured the uptake index (UI). The UI is the ratio between the glandular uptake value and the value for the background region of the skull. We compared the maximal UI in the patients with PD group and the age-matched control group. RESULTS: In the patients with PD group, the mean UI was 4.84 2.65 in the submandibular gland and 3.21 1.36 in the parotid gland. In the age-matched control group, the mean UI was 6.98 3.91 in the submandibular gland and 4.73 2.72 in the parotid gland. The mean UI is significantly decreased in the PD group compared to the age-matched control group (p<0.01). However, there was no statistical difference between the maximal UI and severity of PD (Hoehn-Yahr scale). CONCLUSIONS: Salivary function was decreased in patients with PD. It is suggested that sialorrhea is not due to the excessive production of saliva, but could be explained by swallowing difficulties.
Deglutition ; Humans ; Parkinson Disease* ; Parotid Gland ; Radionuclide Imaging* ; Saliva ; Salivary Glands* ; Sialorrhea ; Skull ; Sodium ; Sodium Pertechnetate Tc 99m ; Submandibular Gland