Abstract:
:The aim of the study was to measure the actual dose at 1 m from the patients per unit activity with the aim of providing a more accurate prediction of the dose levels around radioiodine patients in the hospital, as well as to compare our results with the literature. In this work the demonstration of a patient body tissue attenuation factor is verified by comparing the dose rates measured from the patients with those measured from the unshielded radioiodine capsules immediately after administration of the radioactivity. The normalized dose rate per unit activity is therefore proposed as an operational quantity that can be used to predict exposure rates to staff and patients' relatives. The average dose rate measured from our patient per unit activity was 38.4±11.8 μSv/h/GBq. The calculated attenuation correction factor based on our measurements was 0.55±0.17. The calculated dose rate from a radioiodine therapy patient should normally include a factor accounting for patient body tissue attenuation and scatter. The attenuation factor is currently neglected and not applied in operational radiation protection. Realistic estimation of radiation dose levels from radioiodine therapy patients when properly performed will reduce the operational cost and optimize institutional radiation protection practice. It is recommended to include patient attenuation factors in risk assessment exercises - in particular, when accurate estimates of total effective doses to exposed individuals are required when direct measurements are not possible. The information provided about patient attenuation might benefit radiation protection specialists and regulators.
journal_name
Nucl Med Communjournal_title
Nuclear medicine communicationsauthors
Soliman K,Alenezi Adoi
10.1097/MNM.0000000000000223subject
Has Abstractpub_date
2015-02-01 00:00:00pages
125-8issue
2eissn
0143-3636issn
1473-5628journal_volume
36pub_type
杂志文章abstract::A comparative study of bone marrow scintigraphy using 99Tcm-nanocolloid, conventional bone scintigraphy and bone marrow biopsy were performed in 35 patients with histologically proven small cell carcinoma of the lung to determine whether bone marrow scintigraphy has a role in the early detection of bone marrow metasta...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199401000-00006
更新日期:1994-01-01 00:00:00
abstract::In 70 patients with angiographically confirmed coronary heart disease and in 10 controls, a 4 h exercise (E) (injection of 150 MBq 99Tcm-MIBI) rest (R) (800 MBq) protocol was employed. Of these, 10 patients with 21 myocardial defects after E received a third injection 24 h after. SPECT was used to image myocardial dis...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199002000-00002
更新日期:1990-02-01 00:00:00
abstract::There is a lack of systematic nephrographic studies on epidemic nephritis (EN). We studied 10 patients with EN using [99Tcm]MAG3 gamma camera nephrography and followed up 9 of them 22-68 days later when they had clinically recovered. Variables for renal clearance of [99Tcm]MAG3 and the retention of radioactivity in th...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199101000-00003
更新日期:1991-01-01 00:00:00
abstract::Most dynamic imaging protocols require long scan times that are beyond the range of what can be supported in a routine clinical environment and suffer from various difficulties related to step and shoot imaging techniques. In this short communication, we describe continuous bed motion (CBM) imaging techniques to creat...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000455
更新日期:2016-04-01 00:00:00
abstract::To assess the precision of gated equilibrium radioventriculography in measuring changes in left ventricular stroke volume (LVSV), we studied five dogs each with a chronically implanted electromagnetic flowmeter on the ascending aorta. Per cent changes in left ventricular stroke counts (LVSC) were compared to those in ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-198812000-00009
更新日期:1988-12-01 00:00:00
abstract::Should one correct for extrathyroidal neck radioactivity ('neck background') when interpreting perchlorate discharge test results? A new background correction method was developed using a linear probe. 123I produces photon peaks at two energy levels: 159 keV (gamma-rays) and 28 keV (X-rays), with an attenuation of 15 ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199211000-00013
更新日期:1992-11-01 00:00:00
abstract:PURPOSE:Renal ischemia-reperfusion injury (RIRI) may occur secondary to several reasons leading to renal failure. Coenzyme-Q10 (CoQ10) is a well-known antioxidant. However, the effects CoQ10 against RIRI have not been evaluated. Our aim was to evaluate protective effects of CoQ10 to renal ischemia-reperfusion by bioche...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000001070
更新日期:2019-10-01 00:00:00
abstract::Radioiodine therapy using oral administration of Iodine-131 (I) is a widespread employed strategy for the treatment of hyperthyroidism and thyroid cancer. Such a therapy requires well-trained staff, equipment and procedures regarding radiation safety. The aims of this work are to report an incidental experience of rad...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000001276
更新日期:2020-11-01 00:00:00
abstract::The physical considerations of using dual isotope brain SPECT imaging to monitor blood flow changes during cognitive activation studies were investigated. These factors included field uniformity, spatial resolution and crosstalk. Serial dual isotope single photon emission computed tomographic (SPECT) studies of a test...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199305000-00008
更新日期:1993-05-01 00:00:00
abstract::Fever of unknown origin is defined as a temperature above 39.0 degrees C together with a white blood cell count > or = 15,000 mm-3, the duration of fever exceeding 2 weeks and a correct diagnosis not being obtained in the first week of hospitalization. In neonates and infants with fever of unknown origin, the localiza...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199811000-00003
更新日期:1998-11-01 00:00:00
abstract::Many common PET segmentation methods for malignant lesions use surrounding background activity as a reference. To date, background has to be measured by drawing a second volume of interest (VOI) in nearby, undiseased tissue. This is time consuming as two VOIs have to be determined for each lesion. The aim of our study...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000045
更新日期:2014-03-01 00:00:00
abstract::The influence of zooming on centre-of-rotation (COR) of the rotating camera-based SPECT system and on the resolution of tomographic images was investigated. COR values were measured as a function of zoom factor varying from x1.0 to x3.0. Measurements were performed using two SPECT systems collimated with three collima...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-198701000-00002
更新日期:1987-01-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to evaluate the accuracy of the sequential multiphase and dual-tracer (SMADT) technique utilizing technetium-99m pertechnetate (99mTcO4) and dynamic technetium-99m-2-methoxyisobutylisonitrile (99mTc-MIBI) with single-photon emission computed tomography/computed tomography (SPECT/CT) f...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000215
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVE:This study investigated dopamine transporter blockade in the rat striatum after treatment with various doses of methylphenidate using a high-resolution small animal SPECT ('TierSPECT') and I-FP-CIT. METHODS:I-FP-CIT was administered intravenously 1 h after intraperitoneal injection of methylphenidate (3 mg.k...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0b013e328014a0df
更新日期:2007-03-01 00:00:00
abstract::Liver metastasis is a common consequence of colorectal carcinoma. Early and accurate detection of liver metastasis is crucial for a decision about partial hepatectomy, which is considered a standard and potentially curative therapy in such a setting. The presence of extrahepatic metastases will exclude surgical resect...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200009000-00002
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to determine which of three two-parameter fitting functions (exponential, linear-log, and negative-power function of time) most accurately models early chromium-51-EDTA (51Cr-EDTA) plasma concentration data prior to 120 min in patients with cirrhosis and ascites and understand how th...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000255
更新日期:2015-04-01 00:00:00
abstract::Scintigraphically, Warthin's tumour usually demonstrates increased tracer uptake compared to normal adjacent salivary tissue. A case is presented in which tumour uptake is no greater than the normal adjacent gland. Gustatory stimulation results in failure of tumour tracer washout, and this finding rather than 'hot' sa...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-198806000-00007
更新日期:1988-06-01 00:00:00
abstract::Patients with acute arterial occlusion may suffer from significant muscle necrosis. It is important to determine the amount of regional muscle necrosis for prognostic purposes and evaluation of therapy. We have used technetium-99m-pyrophosphate (PPi) with single photon emission computed tomography (SPECT) to quantitat...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199002000-00009
更新日期:1990-02-01 00:00:00
abstract:PURPOSE:The purpose of this study was to compare the use of fluorine-18-fluorodeoxyglucose (F-FDG) PET with computed tomography (CT) and dynamic contrast-enhanced (DCE) MRI to predict prognosis and monitor treatment in malignant pleural mesothelioma. PATIENTS AND METHODS:F-FDG PET/CT and DCE-MRI studies carried out as...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/MNM.0000000000000789
更新日期:2018-02-01 00:00:00
abstract::During measurements of the extrinsic spatial resolution of a gamma camera, it was noted that there was a variation with the position in the field of view. The problem was traced to the collimator, and this was confirmed by inspection of the parallel hole structure. Removal of the cover showed that the lead foil honeyc...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200009000-00012
更新日期:2000-09-01 00:00:00
abstract::Lymphoscintigraphy for sentinel node (SN) detection has been studied extensively in melanoma and breast cancer. In head and neck squamous cell carcinoma (HNSCC), however, experience in this field is relatively meagre. The purpose of this study was to document and evaluate lymphoscintigraphic findings in HNSCC patients...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-200306000-00006
更新日期:2003-06-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate the clinical role of technetium-99m pertechnetate (Tc-99m) imaging in thyroidectomized differentiated thyroid cancer patients immediately before radioiodine-131 (I-131) treatment (Tx). PATIENT AND METHODS:Eighty-six consecutive post-total-thyroidectomy patients (15 men, 71...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000426
更新日期:2016-02-01 00:00:00
abstract::A miniature, non-imaging caesium iodide nuclear probe optically coupled to a photodiode (the 'Cardioscint') has been developed which, in conjunction with a modified personal computer, is capable of continuous on-line monitoring of left ventricular function and ST-segment level at the bedside. The purpose of this study...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199205000-00004
更新日期:1992-05-01 00:00:00
abstract::The method described by Weisner et al. for stabilizing 99Tcm-hexamethylpropylene amine oxime (99Tcm-HMPAO) with cobalt chloride hexahydrate solution is the most promising developed to date. The aim of our work was to study the behaviour of cobalt during the labelling of leukocytes with 99Tcm-HMPAO stabilized in vitro ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199703000-00010
更新日期:1997-03-01 00:00:00
abstract::An examination of the biokinetics and biodistribution of i.p. administered 131I- or 111In-labelled 791T/36 antibody (1 mg) has been carried out in five patients with stage III/IV ovarian cancer. Blood kinetics and urinary excretion of the radiolabels were assayed. Scintigraphy was performed immediately following admin...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-198908010-00006
更新日期:1989-08-01 00:00:00
abstract::Planar pulmonary scintigraphy is still regularly performed for the evaluation of pulmonary embolism (PE). However, only about 50-80% of cases can be resolved by this approach. This study evaluates the ability of tomographic acquisition (single photon emission computed tomography, SPECT) of the perfusion scan to improv...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-200211000-00011
更新日期:2002-11-01 00:00:00
abstract::The alveolar permeability (AP) in 21 patients with active diffuse infiltrative lung disease (ILD) was measured by 99Tcm-diethylenetriaminapentaacetate (DTPA) radioaerosol inhalation lung scintigraphy. The degree of AP damage in ILD was presented as the slope (% min-1) of the time-activity curve from the dynamic lung i...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199410000-00012
更新日期:1994-10-01 00:00:00
abstract::Esophageal cancer is the third most common malignancy of the alimentary tract. The incidence of esophageal cancer has steadily increased over the past three decades. Almost all therapeutic modalities for esophageal cancer are associated with a considerable mortality and morbidity. Consequently, there has been growing ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章,评审
doi:10.1097/MNM.0b013e32831af204
更新日期:2009-02-01 00:00:00
abstract:PURPOSE:Despite the growing use of fluorine-18-fluorodeoxyglucose (F-FDG) PET texture analysis to measure intratumoural heterogeneity in cancer research, the biologic basis of F-FDG PET-derived texture variables is poorly understood. We aimed to assess correlations between F-FDG PET-derived texture variables and whole-...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/MNM.0000000000000925
更新日期:2018-12-01 00:00:00
abstract::In normal adults, the maintenance of phosphate balance involves the reabsorption of 85-90% of filtered phosphate by the proximal tubule. At a glomerular filtration rate (GFR) of 125 ml min-1 and a plasma phosphate concentration of 1.3 mmol l-1, the filtered phosphate is approximately 235 mmol day-1. Following intraven...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-199807000-00011
更新日期:1998-07-01 00:00:00