Dergi Ara >>
Yıl:2005; Cilt: 6; Sayı: 1>> Özet
TAM METİN
Anadolu Psikiyatri Dergisi; 2005;6(1):48-56
Şizofrenide difüzyon tensör görüntüleme (DTG) bulguları: Eleştirel bir gözden geçirme
AE Tufan, İ Yaluğ
Kocaeli Üniversitesi Tıp Fakültesi Çocuk ve Ergen Ruh Sağlığı ve Hastalıkları ABD, İZMİT
Amaç: Difüzyon Tensör Görüntüleme (DTG) son dönemde şizofreni hastalarında beynin değişik bölgelerini inceleme
amacıyla kullanılmaya başlanan bir ak madde yapısını araştırma yöntemidir. Bu çalışmanın amacı günümüze kadar şizofreni
hastaları üzerinde bu yöntemle yapılmış çalışmaların sonuçlarını eleştirel bir biçimde gözden geçirmektir. Yöntem:
Şizofrenide DTG çalışmaları için PubMed elektronik veri tabanı taranıp sonuçlar gözden geçirilmiştir. Sonuçlar: Sayıları
az olmasına karşın, günümüze kadar şizofreni üzerinde yapılmış DTG çalışmaları bu hastalıkta ak madde anormallikleri
üzerine yoğunlaşmıştır. Tartışma: Ak madde anormalliklerinin yaygın mı, bölgesel mi; birincil mi, yoksa gri madde
anormalliklerine ikincil mi olduğu bilinmemektedir. Şizofrenide DTG bulguları nöropsikolojik ölçeklerle ilişkili bulunmuştur.
DTG verileri üzerinde ilaç tedavisinin etkisi yeterince belirlenmemiştir. Daha objektif dışlama ölçütleri, daha çok sayıda
hasta ile ve her iki cinsiyetten uzunlamasına örneklemlerle yapılmış çalışmalar gerekmektedir. Bu sınırlılıklara rağmen
DTG’ nin canlılar üzerinde ak madde değişikliklerinin görüntülemesi için güçlü bir yöntem olduğu kanısına varılmıştır.
Diffusion tensor imaging (DTI) findings in schizophrenia: a critical review
Objective: Diffusion tensor imaging (DTI) is a tool for examining the white matter microstructure, which recently found
use for imaging of variable regions of the brain in schizophrenic patients. The objective of this study is to critically
review the findings of studies done on schizophrenia patients. Methods: PubMed electronic database was searched for
DTI studies in schizophrenia and the results reviewed. Results: Although few in number; DTI studies done up to date on
schizophrenia provide concentrate on abnormalities in white matter in schizophrenia. Discussion: It is not known whether
abnormalities of white matter are widespread or localised; and primary or secondary to abnormalities of gray matter.
The DTI measures correlate with neuro-psychological measures in schizophrenia. The effect of drug treatment on DTI
variables is inadequately identified. Studies using more objective exclusion criteria, larger populations from both
genders and a prospective design are required. Despite these limitations our opinion is that DTI is a powerful imaging
tool for the study of white matter changes in vivo.

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