BTPA’da solunum/kardiyak hareket artefaktı BT bulguları

Özet

Kalp hareketine bağlı artefakt, CTPA’da bronkovasküler yapılarda bulanıklık ve çift çizgi görünümü oluşturabilir. Kardiyak hareket artefaktı bronkovasküler yapılarda bulanıklık ve çift çizgi artefaktı oluşturabilir; bu artefaktlar subsegmental emboli saptanmasını etkileyebilir. Kardiyak hareket artefaktlarını azaltan yüksek pitch çift kaynaklı CTPA, subsegmental emboli saptanmasını artırabilir. Kalp hareketine bağlı artefaktların azaltılması, CTPA’da subsegmental pulmoner emboli saptanmasını artırabilir.

Faz ve pencere

BTPA tanısal: Kardiyak hareket artefaktı, bronkovasküler yapılarda bulanıklık ve çift çizgi görünümüne yol açabilir.

Önerilen pencereler G genişlik, M merkez; değerler Hounsfield birimi (HU)

AnjiyoG 600 / M +150
MediastenG 350 / M +50
AkciğerG 1500 / M −600

BT bulguları

Damar kenarında çift kontur veya basamaklanma — bronkovasküler yapılarda bulanıklık ve çift çizgi artefaktı görülebilir; bu durum özellikle kardiyak hareket kaynaklı artefaktlarla ilişkilidir.
Hareket kaynaklı yanlış eşleşme, CTPA’da görülebilen artefakt türlerinden biridir.
Aort, kalp ve diyafram hareketi CTPA'da çift görüntü şeklinde hareket artefaktı oluşturabilir.
Nefesini tutmayı engelleyen KOAH veya dispne gibi durumlarda, nefes tutmalı CTPA’da belirgin solunum artefaktları görülebilir.
Kardiyak hareket artefaktı pulmoner arterlerde bulanıklık ve bronkovasküler yapılarda çift çizgi görünümüne yol açabilir.
Kardiyak hareket artefaktı bronkovasküler yapılarda bulanıklık ve çift çizgi görünümü oluşturabilir.
Kardiyak hareket artefaktı, bronkovasküler yapılarda bulanıklık ve çift çizgi görünümü oluşturabilir.

Normalde

Hareket artefaktı, CTPA’da pulmoner damar bulgularının değerlendirilmesini güçleştirebilir; görüntüleri yorumlarken bu olasılığı göz önünde bulundurun.

Normal BT ile kıyasla

Aynı bölgenin, kaynak veri setinde patoloji içermediği belirtilen bir BT incelemesini kesit kesit kaydırın; organ sınırlarını açarak anatomiyi hasta görüntüsüyle karşılaştırın. Küçük rastlantısal bulgular tümüyle dışlanmamıştır.

Kaynak: TotalSegmentator v2.01 veri seti (Wasserthal ve ark., Radiology: Artificial Intelligence 2023), CC BY 4.0, vaka s1278; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.

Ayırıcı tanı

Akut pulmoner emboli, pulmoner arter dolum kusurunun en sık nedenidir; ancak bu bulgu tek başına özgül değildir.
Kontrast karışım artefaktı: damar içinde bulanık yoğunluk geçişi oluşturur ancak aynı anda bronş ve plevra konturları hareketle çiftlenmez.
SVC kaynaklı streak artefaktı: sağ üst mediastene uzanan radyal çizgilenme ve buna komşu sağ üst lob damarında atenüasyon kaybı yapar.
Kronik tromboemboli: duvara yapışık web, bant, damar daralması veya eksantrik organize materyal ile birden fazla düzlemde devamlılık gösterir.

Tuzaklar

Hareket kaynaklı çift görüntüler CTPA’da değerlendirilebilir; yüksek pitch çift kaynaklı protokol aortik, kardiyak ve diyafragmatik hareket artefaktlarını azaltabilir.
Kardiyak hareket artefaktı, bronkovasküler yapılarda bulanıklık ve çift çizgi artefaktı oluşturabilir.
Kardiyak hareket artefaktlarının azaltılması, CTPA’da subsegmental emboli saptanmasını artırabilir.
Kalp hareketi, bronkovasküler yapılarda bulanıklık ve çift çizgi artefaktına yol açabilir.
Kardiyak hareket artefaktı pulmoner arterlerde çift çizgi görünümüne yol açabilir ve subsegmental emboli saptanmasını etkileyebilir.

Kendini dene

Non-EKG-gated CTPA’da kardiyak hareket artefaktıyla hangi görüntü özelliği ilişkilidir?
Cevabı göster
Bronkovasküler yapıların bulanıklaşması ve çift kontur oluşturması. Kardiyak hareket, bronkovasküler yapılarda bulanıklık ve çift çizgi artefaktı oluşturabilir.
CTPA’da hareket artefaktlarını azaltmada hangi protokol daha başarılı bulunmuştur?
Cevabı göster
Yüksek pitch çift kaynaklı BT protokolü. Karşılaştırmalı çalışmada çift kaynaklı protokol hareket artefaktlarını tek kaynaklı tekniğe göre daha fazla azaltmıştır.

İlgili konular

Kaynaklar

Bu sayfadaki 32 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla otomatik olarak karşılaştırıldı; 26 cümle bu karşılaştırmada düzeltildi (2026-10-09).

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Eğitim amaçlıdır; hasta başında tanı ve tedavi kararının yerine geçmez, tıbbi tavsiye değildir. Metinler yapay zekâ desteğiyle yazıldı ve otomatik bir adımda kaynak alıntılarıyla karşılaştırıldı; bu bir tıbbi doğrulama değildir ve içerik uzman radyolog incelemesinden geçmedi. Klinik kararlarda güncel kılavuzları, kurum protokollerini ve radyoloji raporunu esas alın.