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Factors affecting p...
Factors affecting performance of fetal blood T2 measurements for noninvasive estimation of oxygen saturation
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- Hedström, Erik (author)
- Lund University,Lunds universitet,Hjärt-MR-gruppen i Lund,Forskargrupper vid Lunds universitet,Pediatrisk radiologi,Lund Cardiac MR Group,Lund University Research Groups,Skåne University Hospital
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- Piek, Marjolein (author)
- Lund University,Lunds universitet,Hjärt-MR-gruppen i Lund,Forskargrupper vid Lunds universitet,LTH profilområde: Teknik för hälsa,LTH profilområden,Lunds Tekniska Högskola,Lund Cardiac MR Group,Lund University Research Groups,LTH Profile Area: Engineering Health,LTH Profile areas,Faculty of Engineering, LTH,Skåne University Hospital
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- Bidhult-Johansson, Sebastian (author)
- Lund University
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- Ryd, Daniel (author)
- Lund University,Lunds universitet,Klinisk fysiologi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Hjärt-MR-gruppen i Lund,Forskargrupper vid Lunds universitet,Clinical Physiology (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund Cardiac MR Group,Lund University Research Groups,Skåne University Hospital
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- Testud, Fredrik (author)
- Siemens Healthcare AB
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- Toger, Johannes (author)
- Lund University,Lunds universitet,MR Physics,Forskargrupper vid Lunds universitet,Hjärt-MR-gruppen i Lund,LTH profilområde: Teknik för hälsa,LTH profilområden,Lunds Tekniska Högskola,Lund University Research Groups,Lund Cardiac MR Group,LTH Profile Area: Engineering Health,LTH Profile areas,Faculty of Engineering, LTH
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- Aletras, Anthony (author)
- Lund University,Lunds universitet,Hjärt-MR-gruppen i Lund,Forskargrupper vid Lunds universitet,Lund Cardiac MR Group,Lund University Research Groups,Aristotle University of Thessaloniki
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Magnetic Resonance in Medicine. - 1522-2594. ; 90:6, s. 2472-2485
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Abstract
Subject headings
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- PurposeTo ultimately make accurate and precise fetal noninvasive oxygen saturation (sO2) measurements by T2-prepared bSSFP more widely available by systematically assessing error sources in order to potentially reduce perinatal mortality in cardiovascular malformations and fetal growth restriction.MethodsT2-prepared bSSFP data were acquired in phantoms; in flowing blood in adults in the superior sagittal sinus, ascending and descending aorta, and main pulmonary artery; and in the fetal descending aorta and umbilical vein. T2 was assessed in relation to T2 two- or three-parameter curve-fitting techniques, SSFP readout, refocusing time delay (τ), constant and pulsatile blood flow, and impact of T1 recovery. Further, fetal T2 and sO2 variability were quantified in the descending aorta and umbilical vein in healthy fetuses and fetuses with cardiovascular malformation (gestational weeks 32–38).ResultsIn phantoms, three-parameter fitting was accurate irrespective of phase FOV (ConclusionsErrors due to T2-fitting techniques, off-resonance, flow velocity, and insufficient T1 recovery between image acquisitions could be mitigated by using three-parameter fitting with included saturation-prepared images approximating infinite T2-preparation time, adequate shimming covering the fetus and placenta, and by modifying acquisition parameters. Variability in fetal blood T2 and sO2, however, indicate that it is currently not feasible to use these methods for prediction of disease.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk bildbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Image Processing (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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