MR technique for localization and verification procedures in episcleral brachytherapy

Pavel V. Houdek, James G. Schwade, Abdon J. Medina, Catherine A. Poole, Karl R. Olsen, Don H. Nicholson, Sandra Byrne, Robert Quencer, R. Scott Hinks, Vincent Pisciotta

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Spatial definition of an intraocular tumor and subsequent determination of the actual position of an implanted eye plaque are essential for adequate ocular brachytherapy treatment planning. However, a method for verification of the plaque placement which would provide required 3-dimensional information is not available at present. In addition, tumor localization procedures, including ultrasonography and CT techniques, cannot always offer the precision needed for 3-dimensional definition of an intraocular target. This communication describes a magnetic resonance imaging technique specifically developed for both localization and verification procedures. A 1.5 Tesla magnetic resonance scanner, spin-echo pulse sequence (echo time 30 msec, repetition time 700 msec), and commercially available surface coil were used to obtain a series of transverse, coronal, and sagittal images of a slice thickness of 3 mm. Usually, eight scans in each of the three planes were needed for adequate coverage of the orbit. The required patient set-up and data acquisition time did not exceed 40 minutes. With a data matrix size of 256 × 256 pixels and 13 cm field of view, localization and verification were accomplished with a precision of 0.5 mm. Our results suggest that the magnetic resonance imaging technique permits precise integration of diagnostic and therapeutic procedures, and in addition provides adequate data for accurate treatment planning. We conclude that magnetic resonance imaging is the preferred diagnostic technique for episcleral brachytherapy.

Original languageEnglish
Pages (from-to)1111-1114
Number of pages4
JournalInternational journal of radiation oncology, biology, physics
Volume17
Issue number5
DOIs
StatePublished - Jan 1 1989

Fingerprint

Brachytherapy
magnetic resonance
Magnetic Resonance Imaging
imaging techniques
planning
echoes
tumors
Orbit
scanners
data acquisition
field of view
Ultrasonography
repetition
Neoplasms
acquisition
Magnetic Resonance Spectroscopy
coils
Therapeutics
communication
pixels

Keywords

  • Episcleral brachytherapy
  • Episcleral plaque
  • Magnetic resonance

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

Houdek, P. V., Schwade, J. G., Medina, A. J., Poole, C. A., Olsen, K. R., Nicholson, D. H., ... Pisciotta, V. (1989). MR technique for localization and verification procedures in episcleral brachytherapy. International journal of radiation oncology, biology, physics, 17(5), 1111-1114. https://doi.org/10.1016/0360-3016(89)90165-X

MR technique for localization and verification procedures in episcleral brachytherapy. / Houdek, Pavel V.; Schwade, James G.; Medina, Abdon J.; Poole, Catherine A.; Olsen, Karl R.; Nicholson, Don H.; Byrne, Sandra; Quencer, Robert; Hinks, R. Scott; Pisciotta, Vincent.

In: International journal of radiation oncology, biology, physics, Vol. 17, No. 5, 01.01.1989, p. 1111-1114.

Research output: Contribution to journalArticle

Houdek, PV, Schwade, JG, Medina, AJ, Poole, CA, Olsen, KR, Nicholson, DH, Byrne, S, Quencer, R, Hinks, RS & Pisciotta, V 1989, 'MR technique for localization and verification procedures in episcleral brachytherapy', International journal of radiation oncology, biology, physics, vol. 17, no. 5, pp. 1111-1114. https://doi.org/10.1016/0360-3016(89)90165-X
Houdek, Pavel V. ; Schwade, James G. ; Medina, Abdon J. ; Poole, Catherine A. ; Olsen, Karl R. ; Nicholson, Don H. ; Byrne, Sandra ; Quencer, Robert ; Hinks, R. Scott ; Pisciotta, Vincent. / MR technique for localization and verification procedures in episcleral brachytherapy. In: International journal of radiation oncology, biology, physics. 1989 ; Vol. 17, No. 5. pp. 1111-1114.
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