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. 2000 May;21(5):928-31.

A high-resolution fast spin-echo inversion-recovery sequence for preoperative localization of the internal globus pallidus

C A Reich  1 , P A Hudgins, S K Sheppard, P A Starr, R A Bakay
Affiliations

A high-resolution fast spin-echo inversion-recovery sequence for preoperative localization of the internal globus pallidus

C A Reich et al. AJNR Am J Neuroradiol. 2000 May.

Abstract

A fast spin-echo inversion-recovery (FSE-IR) sequence is described for its utility regarding surgical planning for patients with Parkinson's disease (PD) who are undergoing microelectrode-guided internal globus pallidus (GPi) ablation. Images from thirty-seven adult patients with PD were reviewed and visualization of the GPi, globus pallidus externa (GPe), and the intervening lamina was noted. High-resolution images were acquired from all patients despite the external hardware and the patients' movement disorder. In all cases, the conventional surgical trajectory, determined indirectly by a fixed measurement from the anteroposterior commissure line, was modified by the ability to visualize the GPi and optic tract directly. This sequence facilitated accurate stereotactic targeting.

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Figures

<sc>fig</sc> 1.
fig 1.
Axial FSE-IR image [3000/40/4 (TR/TE/excitations), with TI = 200 ms, echo train length = 5, 2 mm slice thickness] through the basal ganglia. Conventional localization of the GPi is a point 22 mm lateral to the midportion of the AC-PC line. This approach does not take into account the normal variations in laterality of the GPi. fig 2. Anatomy of the GP. Axial diagrammatic depiction of the GPi from the GPe. The “lamina medullaris medialis” is synonymous with the GPi-GPe lamina (Borrowed with permission from Cohn and colleagues. Pre- and postoperative MR evaluation of stereotactic pallidotomy. AJNR 1998;19:1075–1080.).
<sc>fig</sc> 3.
fig 3.
Axial (A) and coronal (B) fast spin-echo inversion-recovery sequences [3000/40/2–4, TI = 200 ms, echo train length = 5, 2-mm slice thickness] show GPi-GPe lamina (small arrows), separating the GPi from the GPe. On the axial image, the posterior commissure is not seen. The frame placement technique described only approximates the AC-PC line
See this image and copyright information in PMC

References

    1. Baron MS, Vitek JL, Bakay RA, et al. Treatment of advanced Parkinson's disease by posterior GPi pallidotomy: 1-year results of a pilot study. Ann Neurol 1996;40:355-366 - PubMed
    1. Iacono RP, Shima F, Lonser RR, et al. The results, indications, and physiology of posteroventral pallidotomy for patients with Parkinson's disease. Neurosurgery 1995;36:1128-1127 - PubMed
    1. Laitinen LV, Bergenheim T, Hariz MI. Leksell's posteroventral pallidotomy in the treatment of Parkinson's disease. J Neurosurg 1992;76:53-61 - PubMed
    1. Adams RD, Victor M. Principles of Neurology. 5th ed. New York, NY: McGraw-Hill, Inc 1993 975-982
    1. Cohn MC, Hudgins PA, Sheppard SK, Starr PA, Bakay RAE. Pre- and postoperative MR evaluation of stereotactic pallidotomy. AJNR Am J Neuroradiol 1998;19:1075-1080 - PMC - PubMed