ENFEKSİYÖZ VE ENFLAMATUAR HASTALIKLARIN POZİTRON EMİSYON TOMOGRAFİ/BİLGİSAYARLI TOMOGRAFİ İLE GÖRÜNTÜLENMESİ

Nükleer tıp pek çok enfeksiyöz ve enflamatuar olayın görüntülenmesinde önemli bir yeresahiptir. Fonksiyonel sintigrafik işlemler non-invaziv tanı yöntemleri olup, enfeksiyon veenflamasyonun saptanmasında radyolojik görüntüleme yöntemlerinden (ultrasonografi,bilgisayarlı tomografi, manyetik rezonans görüntüleme) elde edilen verilere tamamlayıcı bilgilersunarlar. Uzun yıllar boyunca bazı konvansiyonel sintigrafik yöntemler enfeksiyon veenflamasyonu belirlemek amacıyla kullanılmışlardır. En sık olarak Galyum-67 (Ga-67) veTeknesyum-99m (Tc-99m) veya indiyum-111 (In-111) ile işaretlenmiş lökositler uygulanmışolup, son yıllarda değişik ajanlarla işaretli antikorlar kullanılarak yapılan immunsintigrafi deuygulanmaktadır. Nükleer tıp yöntemlerinin en gelişmişi olarak bilinen Pozitron EmisyonTomografi/Bilgisayarlı Tomografi (PET/BT) ise anatomik verilerin yanı sıra lezyonun metabolikaktivitesi hakkında bilgi edinme imkânı tanıdığından enfeksiyöz ve enflamatuar hastalıklarıntanısında son yıllarda giderek artan sıklıkla kullanılmaktadır. PET/BT görüntülemedegünümüzde en sık kullanılan radyofarmasötik bir glukoz analoğu olan Fluorine (F)-18 ile işaretliFluoro-2-deoxy-D-glukoz (FDG) bileşiğidir. Malign hastalıkların değerlendirilmesinde PET’ inyaygın kullanımını takiben F–18 FDG’ nin malign olmayan süreçlerde de tutulduğu saptanmışve benign enfeksiyöz ve enflamatuar lezyonlarda F–18 FDG birikimi görülmüştür. Buderlemedeki amacımız enfeksiyöz ve enflamatuar hastalıklarda PET/BT’ nin kullanım alanlarınıözetlemektir

Anahtar Kelimeler:

Pozitron Emisyon Tomografi/Bilgisayarlı Tomografi, Enfeksiyöz veenflamatuar hastalıklar, Görüntüleme

Imaging of Infectious and Inflammatory Diseases With Positron Emission Tomography/Computed Tomography

Nuclear medicine plays an important role in the assessment of a multitude of infectious andinflammatory processes. Functional scintigraphic procedures are part of the noninvasivediagnostic armamentarium and give complementary knowledge over anatomic modalities suchas ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI) forassessment of infection and inflammation. A number of conventional scintigraphic modalitieshave been used for imaging of infection and inflammation. The widest experience has beengained with gallium-67 (Ga-67), leukocytes radiolabeled with either technetium-99m (Tc-99m)or indium-111 (In-111). Immunoscintigraphy using various labeled antibodies has also beenused in recent years. Positron Emission Tomography/Computed Tomography (PET/CT) whichis the most technological method of nuclear medicine give significant information withcombined anatomical and metabolic assessment for the diagnosis of infectious and inflammatorydiseases. With the increasing use of the glucose analog radiopharmaceutical named fluorine18-fluorodeoxyglucose (F–18 FDG) for assessment of malignancies, uptake of thispositron-emitting tracer in nonmalignant processes especially in infectious and inflammatorylesions has also been described. The aim of this review is to summarize the role of PET/CT forthe assessment of infectious and inflammatory processes

Keywords:

Positron Emission Tomography/Computed Tomography, Infectious andinflammatory diseases, Imaging.,

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