Abstract
Rationale and Objectives.: Electromagnetic flowmeters have been used for many years as a standard method to determine blood flow in animal models. The use of a modified probe to measure electromagnetic induction in response to an external, large direct current (DC) field magnetic resonance (MR) imaging system was investigated. Methods.: Extracted sheep iliac vessels were inserted into a pumped saline circuit with a modified probe and placed into a 2.0-T MR research imaging system. Voltage readings were collected at various flow rates ranging from 100 to 400 ml/min. Actual flows were measured with a graduated cylinder. Results.: A correlation of .937 (p < .001) was observed between the measured voltage changes and the actual flows. Baseline drift was also linear and within specified limits. Conclusion.: The results indicate that electromagnetic induction in a conductive fluid can be accurately measured using electrodes and an MR imaging system and that this technique provides possible opportunities for in situ flow measurements in humans.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 135-139 |
| Number of pages | 5 |
| Journal | Academic Radiology |
| Volume | 2 |
| Issue number | 2 |
| DOIs | |
| State | Published - 1995 |
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Keywords
- electromagnetic flowmeters
- electromagnetic induction
- Flow measurements
- magnetic resonance imaging
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
Cite this
Electromagnetic flow measurement using a magnetic resonance imaging static field. / Burns, Steven M.; Barlow, Theodore W.; Katzberg, Richard W; Brock, John M.
In: Academic Radiology, Vol. 2, No. 2, 1995, p. 135-139.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electromagnetic flow measurement using a magnetic resonance imaging static field
AU - Burns, Steven M.
AU - Barlow, Theodore W.
AU - Katzberg, Richard W
AU - Brock, John M.
PY - 1995
Y1 - 1995
N2 - Rationale and Objectives.: Electromagnetic flowmeters have been used for many years as a standard method to determine blood flow in animal models. The use of a modified probe to measure electromagnetic induction in response to an external, large direct current (DC) field magnetic resonance (MR) imaging system was investigated. Methods.: Extracted sheep iliac vessels were inserted into a pumped saline circuit with a modified probe and placed into a 2.0-T MR research imaging system. Voltage readings were collected at various flow rates ranging from 100 to 400 ml/min. Actual flows were measured with a graduated cylinder. Results.: A correlation of .937 (p < .001) was observed between the measured voltage changes and the actual flows. Baseline drift was also linear and within specified limits. Conclusion.: The results indicate that electromagnetic induction in a conductive fluid can be accurately measured using electrodes and an MR imaging system and that this technique provides possible opportunities for in situ flow measurements in humans.
AB - Rationale and Objectives.: Electromagnetic flowmeters have been used for many years as a standard method to determine blood flow in animal models. The use of a modified probe to measure electromagnetic induction in response to an external, large direct current (DC) field magnetic resonance (MR) imaging system was investigated. Methods.: Extracted sheep iliac vessels were inserted into a pumped saline circuit with a modified probe and placed into a 2.0-T MR research imaging system. Voltage readings were collected at various flow rates ranging from 100 to 400 ml/min. Actual flows were measured with a graduated cylinder. Results.: A correlation of .937 (p < .001) was observed between the measured voltage changes and the actual flows. Baseline drift was also linear and within specified limits. Conclusion.: The results indicate that electromagnetic induction in a conductive fluid can be accurately measured using electrodes and an MR imaging system and that this technique provides possible opportunities for in situ flow measurements in humans.
KW - electromagnetic flowmeters
KW - electromagnetic induction
KW - Flow measurements
KW - magnetic resonance imaging
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U2 - 10.1016/S1076-6332(05)80148-5
DO - 10.1016/S1076-6332(05)80148-5
M3 - Article
VL - 2
SP - 135
EP - 139
JO - Academic Radiology
JF - Academic Radiology
SN - 1076-6332
IS - 2
ER -