Paradoxically decreased signal intensity on postcontrast short-TR MR images

D. M. Yousem; I. Ihmeidan; R. Quencer; S. W. Atlas

Paradoxically decreased signal intensity on postcontrast short-TR MR images

D. M. Yousem, I. Ihmeidan, R. Quencer, S. W. Atlas

Research output: Contribution to journal › Article › peer-review

Abstract

Seven lesions are presented in which short TR/short TE images obtained immediately after IV administration of gadopentetate dimeglumine demonstrated an apparent decrease in signal intensity compared with precontrast short TR/short TE images. All seven lesions were hyperintense on precontrast short TR/short TE images. In four cases in which long TR/long TE scans were also obtained, the lesions were hypointense. This phenomenon may be due to a dominant T2 shortening effect by the contrast material that ''overwhelms'' T1 shortening even on short TR/short TE scans. Other compounding factors may include variations in scanning variables, receive and transmit attenuations, or a photographic phenomenon due to window widths and center levels.

Original language	English (US)
Pages (from-to)	875-880
Number of pages	6
Journal	American Journal of Neuroradiology
Volume	12
Issue number	5
State	Published - Jan 1 1991
Externally published	Yes

ASJC Scopus subject areas

Radiology Nuclear Medicine and imaging
Clinical Neurology

Cite this

@article{1e4dda71d0b24b35a1f2c47448ae8aad,

title = "Paradoxically decreased signal intensity on postcontrast short-TR MR images",

abstract = "Seven lesions are presented in which short TR/short TE images obtained immediately after IV administration of gadopentetate dimeglumine demonstrated an apparent decrease in signal intensity compared with precontrast short TR/short TE images. All seven lesions were hyperintense on precontrast short TR/short TE images. In four cases in which long TR/long TE scans were also obtained, the lesions were hypointense. This phenomenon may be due to a dominant T2 shortening effect by the contrast material that ''overwhelms'' T1 shortening even on short TR/short TE scans. Other compounding factors may include variations in scanning variables, receive and transmit attenuations, or a photographic phenomenon due to window widths and center levels.",

author = "Yousem, {D. M.} and I. Ihmeidan and R. Quencer and Atlas, {S. W.}",

year = "1991",

month = jan,

day = "1",

language = "English (US)",

volume = "12",

pages = "875--880",

journal = "American Journal of Neuroradiology",

issn = "0195-6108",

publisher = "American Society of Neuroradiology",

number = "5",

}

TY - JOUR

T1 - Paradoxically decreased signal intensity on postcontrast short-TR MR images

AU - Yousem, D. M.

AU - Ihmeidan, I.

AU - Quencer, R.

AU - Atlas, S. W.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - Seven lesions are presented in which short TR/short TE images obtained immediately after IV administration of gadopentetate dimeglumine demonstrated an apparent decrease in signal intensity compared with precontrast short TR/short TE images. All seven lesions were hyperintense on precontrast short TR/short TE images. In four cases in which long TR/long TE scans were also obtained, the lesions were hypointense. This phenomenon may be due to a dominant T2 shortening effect by the contrast material that ''overwhelms'' T1 shortening even on short TR/short TE scans. Other compounding factors may include variations in scanning variables, receive and transmit attenuations, or a photographic phenomenon due to window widths and center levels.

AB - Seven lesions are presented in which short TR/short TE images obtained immediately after IV administration of gadopentetate dimeglumine demonstrated an apparent decrease in signal intensity compared with precontrast short TR/short TE images. All seven lesions were hyperintense on precontrast short TR/short TE images. In four cases in which long TR/long TE scans were also obtained, the lesions were hypointense. This phenomenon may be due to a dominant T2 shortening effect by the contrast material that ''overwhelms'' T1 shortening even on short TR/short TE scans. Other compounding factors may include variations in scanning variables, receive and transmit attenuations, or a photographic phenomenon due to window widths and center levels.

UR - http://www.scopus.com/inward/record.url?scp=0025998930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025998930&partnerID=8YFLogxK

M3 - Article

C2 - 1950915

AN - SCOPUS:0025998930

VL - 12

SP - 875

EP - 880

JO - American Journal of Neuroradiology

JF - American Journal of Neuroradiology

SN - 0195-6108

IS - 5

ER -

Paradoxically decreased signal intensity on postcontrast short-TR MR images

Abstract

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this