دورية أكاديمية
Glomerular filtration rate measured by using triphasic helical CT with a two-point Patlak plot technique.
| العنوان: | Glomerular filtration rate measured by using triphasic helical CT with a two-point Patlak plot technique. |
|---|---|
| المؤلفون: | Hackstein N; Department of Diagnostic Radiology, Justus-Liebig Universität Giessen, Klinikstr 36, 35385 Giessen, Germany., Wiegand C, Rau WS, Langheinrich AC |
| المصدر: | Radiology [Radiology] 2004 Jan; Vol. 230 (1), pp. 221-6. Date of Electronic Publication: 2003 Nov 26. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Radiological Society of North America Country of Publication: United States NLM ID: 0401260 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0033-8419 (Print) Linking ISSN: 00338419 NLM ISO Abbreviation: Radiology Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Easton, PA : Radiological Society of North America Original Publication: [Illinois?] : Radiological Society of North America, [1923]- |
| مواضيع طبية MeSH: | Glomerular Filtration Rate* , Tomography, X-Ray Computed*, Kidney Diseases/*diagnostic imaging , Kidney Diseases/*physiopathology, Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Kidney Function Tests/statistics & numerical data ; Male ; Middle Aged ; Reproducibility of Results |
| مستخلص: | Purpose: To determine the accuracy of the two-point Patlak plot in the calculation of glomerular filtration rate (GFR). Materials and Methods: Fifty patients without acute renal disorder were included. GFR was calculated by using a two-point Patlak plot technique. The computed tomography (CT) protocol consisted of a plain examination followed by two contrast material-enhanced examinations in the arterial and portovenous phase. Each examination included the entire kidneys and was performed after injection of 120 mL iopromide and 300 mg of iodine per milliliter given per 75 kg of body weight. All examinations were performed with a standard abdominal protocol. Section thickness was 4 x 2.5 mm, and table advance was 12.5 mm. Bolus triggering commenced 10 seconds after the start of contrast medium injection. Twelve dynamic scans were obtained with reduced tube current every 3 seconds to obtain sufficient arterial input function data. Correction for hematocrit level was made by using the unenhanced attenuation of the aorta. As a reference method, plasma clearance of the contrast medium injected for CT was calculated from three iodine plasma concentration measurements obtained 3, 4, and 5 hours after injection. Linear correlation was performed. Results: GFR was calculated from CT data in 48 patients. Two patients were excluded because of breathing errors. Mean GFR was 80 mL/min (range, 17-153 mL/min) as measured with iopromide plasma clearance and 82 mL/min (range, 28-148 mL/min) as measured with CT. Linear correlation between the two methods was r = 0.889; GFR calculated with the two-point Patlak plot was equal to 15 plus 0.83 times GFR (plasma clearance). The mean difference between GFRs as determined with the two methods was -1.2 mL/min (95% CI: -27.1, 24.6). Conclusion: Total GFR can be measured accurately with minimally extended triphasic CT in patients without acute renal disorder by using a two-point Patlak plot technique. (Copyright RSNA, 2004) |
| تواريخ الأحداث: | Date Created: 20031203 Date Completed: 20040202 Latest Revision: 20161124 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1148/radiol.2301021266 |
| PMID: | 14645882 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 0033-8419 |
|---|---|
| DOI: | 10.1148/radiol.2301021266 |