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Ultrasound evaluation of normal and abnormal fetuses: comparison of conventional, tissue harmonic, and pulse-inversion harmonic imaging techniques.

Ryu JA, Kim B, Kim S, Yang SH, Choi MH, Ahn HS - Korean J Radiol (2003 Jul-Sep)

Bottom Line: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05).There was, though, no significant difference between THI and PIHI.Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. bhkim@smc.samsung.co.kr

ABSTRACT

Objective: To determine the usefulness of tissue harmonic imaging (THI) and pulse-inversion harmonic imaging (PIHI) in the evaluation of normal and abnormal fetuses.

Materials and methods: Forty-one pregnant women who bore a total of 31 normal and ten abnormal fetuses underwent conventional ultrasonography (CUS), and then THI and PIHI. US images of six organ systems, namely the brain, spine, heart, abdomen, extremities and face were compared between the three techniques in terms of overall conspicuity and the definition of borders and internal structures.

Results: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05). There was, though, no significant difference between THI and PIHI. Affected organs in abnormal fetuses were more clearly depicted at THI and PIHI than at CUS.

Conclusion: Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

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Related in: MedlinePlus

Transverse scan of the fetal head at 12 weeks' gestation: (A) CUS, (B) THI, (C) PIHI. The choroid plexuses (arrows) present in lateral ventricles are clearly visible at C, but internal structures are not clearly depicted at A.
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Figure 3: Transverse scan of the fetal head at 12 weeks' gestation: (A) CUS, (B) THI, (C) PIHI. The choroid plexuses (arrows) present in lateral ventricles are clearly visible at C, but internal structures are not clearly depicted at A.

Mentions: A comparison of overall conspicuity and definition of the borders and internal structures of the six organ systems, as seen at CUS, THI, and PIHI, appears in Table 2. For the brain, heart, abdomen and face, the overall conspicuity of fetal organs was significantly better at THI and PIHI than at CUS (Fig. 1) (p < 0.05), though there was no significant difference between THI and PIHI. For the spine (Fig. 2) and extremities, THI and PIHI were not significantly different from CUS. In two first-trimester fetuses, THI and PIHI delineated internal structures better than CUS (Fig. 3), though this small number of fetuses made statistical analysis impossible.


Ultrasound evaluation of normal and abnormal fetuses: comparison of conventional, tissue harmonic, and pulse-inversion harmonic imaging techniques.

Ryu JA, Kim B, Kim S, Yang SH, Choi MH, Ahn HS - Korean J Radiol (2003 Jul-Sep)

Transverse scan of the fetal head at 12 weeks' gestation: (A) CUS, (B) THI, (C) PIHI. The choroid plexuses (arrows) present in lateral ventricles are clearly visible at C, but internal structures are not clearly depicted at A.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2698086&req=5

Figure 3: Transverse scan of the fetal head at 12 weeks' gestation: (A) CUS, (B) THI, (C) PIHI. The choroid plexuses (arrows) present in lateral ventricles are clearly visible at C, but internal structures are not clearly depicted at A.
Mentions: A comparison of overall conspicuity and definition of the borders and internal structures of the six organ systems, as seen at CUS, THI, and PIHI, appears in Table 2. For the brain, heart, abdomen and face, the overall conspicuity of fetal organs was significantly better at THI and PIHI than at CUS (Fig. 1) (p < 0.05), though there was no significant difference between THI and PIHI. For the spine (Fig. 2) and extremities, THI and PIHI were not significantly different from CUS. In two first-trimester fetuses, THI and PIHI delineated internal structures better than CUS (Fig. 3), though this small number of fetuses made statistical analysis impossible.

Bottom Line: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05).There was, though, no significant difference between THI and PIHI.Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. bhkim@smc.samsung.co.kr

ABSTRACT

Objective: To determine the usefulness of tissue harmonic imaging (THI) and pulse-inversion harmonic imaging (PIHI) in the evaluation of normal and abnormal fetuses.

Materials and methods: Forty-one pregnant women who bore a total of 31 normal and ten abnormal fetuses underwent conventional ultrasonography (CUS), and then THI and PIHI. US images of six organ systems, namely the brain, spine, heart, abdomen, extremities and face were compared between the three techniques in terms of overall conspicuity and the definition of borders and internal structures.

Results: For the brain, heart, abdomen and face, overall conspicuity at THI and PIHI was significantly better than at CUS (p < 0.05). There was, though, no significant difference between THI and PIHI. Affected organs in abnormal fetuses were more clearly depicted at THI and PIHI than at CUS.

Conclusion: Both THI and PIHI appear to be superior to CUS for the evaluation of normal or abnormal structures, particularly the brain, heart, abdomen and face.

Show MeSH
Related in: MedlinePlus