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J Ferrucci

Publications and source records attributed to J Ferrucci.

4 recordsLinked to original sources
PubMed1997

Magnetic resonance pancreatography.

Magnetic resonance cholangiopancreatography (MRCP) uses magnetic resonance (MR) pulse sequences in which static fluid appears bright against a low signal or dark background. When these MR images are subjected to postprocessing techniques, they produce images that resemble the pancreatograms obtained using endoscopic retrograde cholangiopancreatography (ERCP). The MRCP examination is easily performed, is noninvasive, requires no contrast injection, and has no known complications. The place of MRCP in the evaluation of disorders of the pancreas is not yet fully established, but several well-defined roles have already emerged. These include the evaluation of the pancreatic duct after failed or incomplete ERCP, and the evaluation of complete pancreatic duct obstruction. The technical aspects required for MRCP of the pancreatic duct, and the established and emerging roles for MRCP in the pancreatic duct, are described here.

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PubMed1991

In vitro evaluation of a mechanical injector for infusion of magnetic resonance contrast media.

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.

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