In Vitro Evaluation of a Mechanical Injector for Infusion of Magnetic Resonance Contrast Media
| Autor: | C J Fretz, Bruce R. Rosen, Sanjay Saini, Jr Jt Ferrucci, C. R. Fisel |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
medicine.medical_specialty
Materials science medicine.diagnostic_test medicine.medical_treatment Contrast Media Magnetic resonance imaging General Medicine Injector Magnetic Resonance Imaging Volumetric flow rate law.invention Needle size Viscosity Flip angle Volume (thermodynamics) law medicine Humans Infusions Parenteral Radiology Nuclear Medicine and imaging Radiology Saline Biomedical engineering |
| Zdroj: | Investigative Radiology. 26:748-751 |
| ISSN: | 0020-9996 |
| DOI: | 10.1097/00004424-199108000-00011 |
| Popis: | The authors evaluated the performance of a prototype mechanical injector developed for infusion of magnetic resonance (MR) contrast media. The injector was installed in a 0.6-T clinical MR scanner, and evaluation was made using saline (viscosity: 1.0 cP) and gadopentetate dimeglumine (viscosity: 4.9 cP) with 16-, 21-, and 25-gauge needles, and 244- and 366-cm connecting tubing. At a fixed flow rate of 1 mL/second, volume infused was within 10% of the desired volume except for infusions less than 1 mL. Reproduction of flow rates was less reliable. With saline, maximal flow rates were 5.5 mL/second, 4.2 mL/second, and 1.1 mL/second for the 16-, 21-, and 25-gauge needles, respectively, and 3.7 mL/second, 2.4 mL/second, and 0.9 mL/second, respectively, for gadopentetate dimeglumine. Needle size was identified as the major factor limiting flow rate. The magnet was reshimmed after the injector was installed, and no deleterious effects were identified on gradient echo (TR: 250/TE:18/flip angle 60 degrees) MR images. |
| Databáze: | OpenAIRE |
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