Bağımlı dansite ve pozisyonel opasite

Özet

Sırtüstü çekimde yerçekimine bağlı posterior bazal dansite artışı, özellikle inspirasyon yetersizse hafif buzlu cam veya ince retikülasyon görünümü verebilir. Prone HRCT, özellikle supin görüntüde belirsiz posterior subplevral opasitelerin pozisyon etkisini değerlendirmek için hedefli ek inceleme olarak kullanılır; supin seride belirgin traksiyon bronşiektazisi veya bal peteği bulunan fibrotik değişiklikte ek prone seri çoğu kez tanı için gerekli değildir. Bu karşılaştırma, alt toraksı kısmen içeren incelemelerde veya kuşkulu erken interstisyel anormallikte BT yorumunu değiştirebilir. Pozisyonel opasiteyi fibrozis diye adlandırmak hastalık yükünü abartabilir; kalıcı lezyonu pozisyonel sanmak ise gerçek parankim hastalığını gizler.

Faz ve pencere

HRCT tanısal

Kontrastsız sırtüstü ince kesitte posterior subplevral alt loblarda bulanık buzlu cam veya ince çizgisel dansite artışı görülebilir; inspirasyon hacmi azsa yerçekimine bağlı atelektazi belirginleşir.

HRCT tanısal

Prone seri aynı akciğer bölgelerini ters yerçekimi yönünde gösterir; sırtüstü görüntüdeki posterior opasitenin gerilemesi veya kaybolması pozisyonel bileşeni destekler, sürmesi gerçek parankim anormalliği olasılığını artırır. Fibrotik ILA'larda supin BT tek başına yüksek tanısal doğruluk ve okuyucular arası uyum sağlarken, prone BT'nin ek katkısı nonfibrotik ILA tanısında belirgindir.

Önerilen pencereler: Akciğer (G 1500 / M -600).

BT bulguları

• Bağımlı akciğer alanlarında atenüasyon — supin PET/BT'de bağımlı akciğerler, bağımlı olmayan alanlara göre daha yüksek HU gösterebilir.
• Prone görüntüde gerileme — aynı anatomik bölgedeki opasitenin yüzüstü pozisyonda belirgin azalması pozisyonel bileşeni gösterir.
• Prone pozisyonda da süren retikülasyon, pozisyona bağlı olmayan interstisyel anormallik olasılığını destekler.
• Suboptimal inspirasyon — yaygın damar yakınlaşması ve bazal yoğunlaşma bağımlı atelektaziyi artırabilir.

Normalde

Supin ve prone BT'yi birlikte değerlendirin; prone BT nonfibrotik ILA tanısına katkı sağlarken, supin BT fibrotik ILA tanısı için tek başına yüksek doğruluk ve okuyucular arası uyum gösterebilir.

Ayırıcı tanı

Erken interstisyel akciğer anormalliği

buzlu cam veya retikülasyon prone görüntüde de devam eder; dağılım başka zonlara uzanabilir.

İnterstisyel akciğer ödemi

buzlu cam opasitesi ödemle ilişkili olabilir.

Alt lob enfeksiyonu

viral pnömonide buzlu cam opasiteleri ve bağımlı konsolidasyon görülebilir.

Subsegmental atelektazi

çizgisel opasiteye hacim kaybı veya bronkovasküler yapıların yakınlaşması eşlik edebilir; küçük alan prone ile açılabilir.

Tuzaklar

• Sırtüstü seride görülen her posterior buzlu camı interstisyel hastalık saymayın; ince kesitte prone karşılaştırma geçici bağımlı bileşeni ortaya çıkarabilir.
• Prone seride opasitenin sürmesi tek başına fibrozis demek değildir; enfeksiyon, ödem ve diğer infiltratif süreçleri eşlikçi morfolojiyle ayırın.
• Pozisyon değişikliğinin akciğer hacmini ve bazal havalanmayı da değiştirdiğini unutmayın; kıyası aynı anatomik bölge ve benzer inspirasyon düzeyinde yapın.
• Supin BT’de retikülasyon, traksiyon bronşiektazisi veya bal peteği belirginse fibrotik interstisyel anormallik prone görüntü olmadan da değerlendirilebilir; ek prone seri en çok belirsiz nonfibrotik opasitede katkı sağlar.

Kendini dene

1. Sırtüstü görüntüde posterior bazal buzlu cam izleniyor; prone seride aynı alan tamamen açılıyor ve lob hacmi korunuyor. En uygun yorum hangisidir?

   • Pozisyonel bağımlı opasite
   • Fibrotik NSIP
   • Alt lob pnömonisi
   • İnterstisyel ödem
   Cevabı göster

   Pozisyonel bağımlı opasite. Prone pozisyonda opasitenin tamamen kaybolması ve lob hacminin korunması pozisyonel bağımlı opasiteyi destekler. Bu bulgu geçici bağımlı atelektatik bileşenle uyumludur, ancak tek başına kalıcı fibrozis ya da özgül bir patoloji tanısı değildir.

2. Prone BT'nin interstisyel akciğer anormalliklerini değerlendirmeye katkısı hangi grupta daha belirgindir?

   • Nonfibrotik ILA şüphesinde
   • Fibrotik ILA şüphesinde; supin BT tek başına yetersizdir
   • Yalnızca plevral plak şüphesinde
   • Hiçbir ILA grubunda
   Cevabı göster

   Nonfibrotik ILA şüphesinde. Çalışmada prone BT nonfibrotik ILA tanısına katkı sağlarken, fibrotik ILA'larda supin BT tek başına yüksek tanısal doğruluk ve okuyucular arası uyum göstermiştir.

Kaynaklar

Bu sayfadaki 32 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 1 cümle bu karşılaştırmada düzeltildi (2026-10-09).

1. Cryptogenic brain abscess: Right-to-left shunt in pulmonary arteriovenous malformation and hepatopulmonary syndrome ☆pmc.ncbi.nlm.nih.gov
2. Best practices in shape-sensing robotic bronchoscopy with mobile cone beam computed tomography guidance: how I do itpmc.ncbi.nlm.nih.gov
3. Giant Hiatal Hernia Mimicking Acute Coronary Syndrome: A Case Reportpmc.ncbi.nlm.nih.gov
4. Position‐Dependent Lung Shadow Movementpmc.ncbi.nlm.nih.gov
5. Sex-related differences in lung injury distribution and outcomes in COVID-19 acute respiratory failure: insights from the CT-COVID19 multicenter study grouppmc.ncbi.nlm.nih.gov
6. Position-Dependent Lung Shadow Movement.pubmed.ncbi.nlm.nih.gov
7. Pulmonary Langerhans cell histiocytosis in children: a spectrum of radiologic findings.pubmed.ncbi.nlm.nih.gov
8. Early Prone Positioning and Non-Invasive Ventilation in a Critical COVID-19 Subset. A Single Centre Experience in Southern Italy.pubmed.ncbi.nlm.nih.gov
9. Clinically focused multi-cohort benchmarking as a tool for external validation of artificial intelligence algorithm performance in basic chest radiography analysis.pubmed.ncbi.nlm.nih.gov
10. Outcomes of a Foldable Capsular Vitreous Body Implantation: A Retrospective Study.pubmed.ncbi.nlm.nih.gov
11. Thoracic Computed Tomography to Assess ARDS and COVID-19 Lungs.pubmed.ncbi.nlm.nih.gov
12. Multimodality imaging characteristics of tension pyopneumothorax secondary to pulmonary carcinoma in a cat.pubmed.ncbi.nlm.nih.gov
13. Focal dependent pleural thickening at MDCT: pleural lesion or functional abnormality?pubmed.ncbi.nlm.nih.gov
14. Forensic pathological evaluation of postmortem pulmonary CT high-density areas in serial autopsy cases of sudden cardiac death.pubmed.ncbi.nlm.nih.gov
15. [Evaluation and clinical management of interstitial lung abnormalities : Position paper of the Austrian Society of Pneumology (ÖGP) and the Austrian Radiological Society (ÖRG) 2026].pubmed.ncbi.nlm.nih.gov
16. Prone position PET/CT is useful in reducing gravity-dependent opacity-related [ 18 F]fluorodeoxyglucose uptake.pubmed.ncbi.nlm.nih.gov
17. Effect of position and time held in that position on ground-glass opacity in computed tomography images of dogs.pubmed.ncbi.nlm.nih.gov
18. Adult Acute Respiratory Distress Syndrome (ARDS) Caused by Human Rhinovirus During Janus Kinase Inhibitor Therapy for Rheumatoid Arthritis: A Case Report and Literature Review.pubmed.ncbi.nlm.nih.gov
19. Lung volume assessment for mean dark-field coefficient calculation using different determination methods.pubmed.ncbi.nlm.nih.gov
20. Host, Pathogen, and Pulmonary Anatomy in Pneumonia: An Integrated Imaging and Clinical Perspective.pubmed.ncbi.nlm.nih.gov
21. The impact of technical factors on the chest radiographic findings in COVID-19 pneumonia.pubmed.ncbi.nlm.nih.gov
22. Pneumothorax and Hemothorax: Practical Approaches for Radiologists.pubmed.ncbi.nlm.nih.gov
23. AI-based chest CT quantification of interstitial lung disease in idiopathic inflammatory myopathies: agreement with expert visual assessment in 107 patients.pubmed.ncbi.nlm.nih.gov
24. Diagnostic, prognostic, and therapeutic challenges in patients with hypersensitivity pneumonitis.pubmed.ncbi.nlm.nih.gov
25. Contemporary 0.55 T MRI to visualize interstitial lung disease - An exploratory study.pubmed.ncbi.nlm.nih.gov
26. Thoracic joint abnormalities and impaired thoracic motion in idiopathic pleuroparenchymal fibroelastosis: an exploratory study using inspiratory and expiratory CT.pubmed.ncbi.nlm.nih.gov
27. Imaging in animal models: bridging experimental findings and human pathophysiology.pubmed.ncbi.nlm.nih.gov
28. Multi-scale Lesion Feature Fusion and Location-Aware for Chest Multi-disease Detection.pubmed.ncbi.nlm.nih.gov
29. ESR Essentials: imaging in fibrotic lung diseases-practice recommendations by the European Society of Thoracic Imaging.pubmed.ncbi.nlm.nih.gov
30. CT Morphologic Characteristics and Variant Patterns of Interstitial Pulmonary Fibrosis in Systemic Lupus Erythematosus.pubmed.ncbi.nlm.nih.gov
31. Emerging 2019 Novel Coronavirus (2019-nCoV) Pneumonia.pubmed.ncbi.nlm.nih.gov
32. Consensus statement on thoracic radiology terminology in Portuguese used in Brazil and in Portugal.pubmed.ncbi.nlm.nih.gov
33. 2.5-mm articulated endoluminal forceps using a compliant mechanism.pubmed.ncbi.nlm.nih.gov
34. Long-term safety and effectiveness of the "OptEase" vena cava filter.pubmed.ncbi.nlm.nih.gov
35. A biomarker-guided framework for corticosteroid treatment stratification in acute exacerbation of idiopathic pulmonary fibrosis.pubmed.ncbi.nlm.nih.gov
36. Lipoid Pneumonia: HRCT and MRI Spectrum, Diagnostic Pitfalls, and Imaging-Based Diagnostic Workflow.pubmed.ncbi.nlm.nih.gov
37. Clinical course, treatment and outcome of severe pneumocystis pneumonia in patients with autoimmune or inflammatory diseases: a prospective study.pubmed.ncbi.nlm.nih.gov
38. Lung imaging methods: indications, strengths and limitations.pubmed.ncbi.nlm.nih.gov
39. Fleischner Society: Glossary of Terms for Thoracic Imaging.pubmed.ncbi.nlm.nih.gov
40. Application of an improved YOLOv5s-based deep learning model for automated detection of pulmonary adenocarcinoma <i>in situ</i> and minimally invasive adenocarcinoma.pubmed.ncbi.nlm.nih.gov
41. Dual-channel grouped cross-dimension attention V-Net for pulmonary nodule segmentation.pubmed.ncbi.nlm.nih.gov
42. Sex-related differences in lung injury distribution and outcomes in COVID-19 acute respiratory failure: insights from the CT-COVID19 multicenter study group.pubmed.ncbi.nlm.nih.gov
43. Automated identification of interstitial lung abnormalities in lung screening using quantitative CT.pubmed.ncbi.nlm.nih.gov
44. Case Report: Acute interstitial pneumonia as the initial presentation of Anti-EJ antisynthetase syndrome: a case of severe respiratory failure with rapid response to cyclophosphamide.pubmed.ncbi.nlm.nih.gov
45. Current diagnosis, epidemiology, and management of interstitial lung abnormalities.pubmed.ncbi.nlm.nih.gov
46. Central airway pathology: clinic features, CT findings with pathologic and virtual endoscopy correlation.pubmed.ncbi.nlm.nih.gov
47. Understanding cystic lung lesions in smokers with interstitial lung disease: radiologic-pathological correlation.pubmed.ncbi.nlm.nih.gov
48. ARE COVID-19 PNEUMONIA FINDINGS DIFFERENT BETWEEN COMORBID AND NON-COMORBID PATIENTS? THE HIGH RESOLUTION COMPUTED TOMOGRAPHY FEATURES OF THE 108 FOLLOW-UP PATIENTS.pubmed.ncbi.nlm.nih.gov
49. Body mass index and thoracic morphology parameters as predictors of pneumothorax in CT-guided lung biopsies.pubmed.ncbi.nlm.nih.gov
50. Prone positioning in cone beam CT-guided robotic bronchoscopy case series: a strategy to minimize atelectasis and improve access to posteromedial lower lobe nodules.pubmed.ncbi.nlm.nih.gov
51. Quantitative Assessment of Postural Influence on Lung Function Using Deformable Image Registration-Based Breath-Hold CT Ventilation Imaging.pubmed.ncbi.nlm.nih.gov
52. Imaging of pediatric pulmonary infections: A pictorial review.pubmed.ncbi.nlm.nih.gov
53. Medication-induced lung disease in children.pubmed.ncbi.nlm.nih.gov
54. Platypnea-orthodeoxia syndrome associated with COVID-19 pneumonia: a case report.pubmed.ncbi.nlm.nih.gov
55. Computer-aided COVID-19 diagnosis and a comparison of deep learners using augmented CXRs.pubmed.ncbi.nlm.nih.gov
56. Incidental pulmonary findings on CT in daily practice: the nodule and the interstitial lung abnormalities - what's old, what's new.pubmed.ncbi.nlm.nih.gov
57. Interstitial Lung Abnormalities: State of the Art.pubmed.ncbi.nlm.nih.gov
58. Deep-learning based quantitative evaluation of postoperative atelectasis following right upper lobectomy.pubmed.ncbi.nlm.nih.gov
59. AI-Based Quantitative HRCT for In-Hospital Adverse Outcomes and Exploratory Assessment of Reinfection in COVID-19.pubmed.ncbi.nlm.nih.gov
60. Comprehensive review of pulmonary embolism imaging: past, present and future innovations in computed tomography (CT) and other diagnostic techniques.pubmed.ncbi.nlm.nih.gov
61. Shape-Sensing Robotic Bronchoscopy with Integrated Mobile Cone-Beam CT Guidance for Intraoperative Localization of Lung Tumors Using Indocyanine Green.pubmed.ncbi.nlm.nih.gov
62. Characterizing heterogeneity and subphenotyping acute respiratory distress syndrome with computed tomography.pubmed.ncbi.nlm.nih.gov
63. A case report of bevacizumab-induced subcapsular renal hemorrhage in a patient with lung adenocarcinoma.pubmed.ncbi.nlm.nih.gov
64. Respiratory Emergencies in Disasters: A Narrative Review.pubmed.ncbi.nlm.nih.gov
65. Lung Imaging in Acute Hypoxemic Respiratory Failure: From Physics to Bedside Applications.pubmed.ncbi.nlm.nih.gov
66. Hypotension and pulmonary atelectasis during general anaesthesia: a randomised crossover laboratory study.pubmed.ncbi.nlm.nih.gov
67. Rheumatoid arthritis associated interstitial lung disease: diagnostic accuracy of lung ultrasound compared to chest high resolution computed tomography.pubmed.ncbi.nlm.nih.gov
68. Case Report: Delayed appearance of the ablation margin after CT-guided microwave ablation of a solid pulmonary nodule.pubmed.ncbi.nlm.nih.gov
69. Awake Prone Positioning in Moderate ARDS: A Case Report.pubmed.ncbi.nlm.nih.gov
70. Long-term chest CT abnormalities up to 4.5 years after COVID-19 hospitalization and their association with dyspnea and fatigue: a prospective cohort study.pubmed.ncbi.nlm.nih.gov
71. Optimizing prone CT use for suspected interstitial lung abnormalities.pubmed.ncbi.nlm.nih.gov
72. Clinical and radiological characteristics of Mpox pneumonia in immunosuppressed HIV-infected patients: a multicenter study from China.pubmed.ncbi.nlm.nih.gov
73. CT quantification of interstitial lung abnormalities: a prospective comparison between supine and prone positions.pubmed.ncbi.nlm.nih.gov
74. Giant Hiatal Hernia Mimicking Acute Coronary Syndrome: A Case Report.pubmed.ncbi.nlm.nih.gov
75. Cryptogenic brain abscess: Right-to-left shunt in pulmonary arteriovenous malformation and hepatopulmonary syndrome.pubmed.ncbi.nlm.nih.gov
76. Phase-resolved functional lung magnetic resonance imaging for evaluation of lung perfusion and ventilation in fibrosing interstitial lung diseases.pubmed.ncbi.nlm.nih.gov
77. Guidance for clinical practice using emergency and point-of-care ultrasonography.pubmed.ncbi.nlm.nih.gov
78. Imaging the Injured Lung: Mechanisms of Action and Clinical Use.pubmed.ncbi.nlm.nih.gov
79. Difference in Local Lung Movement During Tidal Breathing Between COPD Patients and Asthma Patients Assessed by Four-dimensional Dynamic-ventilation CT Scan.pubmed.ncbi.nlm.nih.gov
80. Correlation of Lung Texture Analysis by Computer-Aided Lung Informatics for Pathology Evaluation and Rating (CALIPER) With High-Resolution Computed Tomography and Lung Function in Fibrosing Interstitial Lung Diseases.pubmed.ncbi.nlm.nih.gov
81. Artificial intelligence and the evolution of the electrocardiogram: from cardiovascular diagnostic tool to digital biomarker.pubmed.ncbi.nlm.nih.gov
82. Imaging in chronic thromboembolic pulmonary hypertension: review of the current literature.pubmed.ncbi.nlm.nih.gov
83. Different chest HRCT scan protocols change the extent of ground glass opacities.pubmed.ncbi.nlm.nih.gov
84. Lung ultrasound in a nutshell. Lines, signs, some applications, and misconceptions from a radiologist's point of view.pubmed.ncbi.nlm.nih.gov
85. Case Report: Novel compound heterozygous mutations in <i>SLC34A2</i> gene: a case of pulmonary alveolar microlithiasis in a child.pubmed.ncbi.nlm.nih.gov
86. Unsupervised Anomaly Detection in Medical Imaging: A Survey of Methods, Challenges, and Future Directions.pubmed.ncbi.nlm.nih.gov
87. International Society of Paediatric Surgical Oncology (IPSO) Minimally Invasive Surgery (MIS) Guidelines.pubmed.ncbi.nlm.nih.gov
88. Current and Emerging Therapeutic Strategies for the Treatment of Duchenne Muscular Dystrophy.pubmed.ncbi.nlm.nih.gov
89. SPOT THE BOT: A comparative quality assessment of AI-generated written instructions for lung ultrasound training.pubmed.ncbi.nlm.nih.gov
90. Breathe easy, baby, breathe. Lung ultrasound in neonatal critical care.pubmed.ncbi.nlm.nih.gov
91. Postoperative Pulmonary Complications: Clinical and Imaging Insightspubmed.ncbi.nlm.nih.gov
92. The Impact of Genetics on Pediatric Interstitial Lung Diseases: A Narrative Literature Review and Clinical Implications.pubmed.ncbi.nlm.nih.gov
93. Clinically Suspected Whipple Disease Presenting with Acute Kidney Injury as the Initial Manifestation and Complicated by Severe Pneumonia Requiring Veno-Venous Extracorporeal Membrane Oxygenation.pubmed.ncbi.nlm.nih.gov
94. COVID-19 ARDS: a review of imaging features and overview of mechanical ventilation and its complications.pubmed.ncbi.nlm.nih.gov
95. Pathophysiology of light phenotype SARS-CoV-2 interstitial pneumonia: from histopathological features to clinical presentations.pubmed.ncbi.nlm.nih.gov
96. Pathophysiology of Acute Respiratory Distress Syndrome and COVID-19 Lung Injury.pubmed.ncbi.nlm.nih.gov
97. Immune checkpoint inhibitor-related intestinal pseudo-obstruction and multisystem immune-related adverse events in a post-gastrectomy patient: a case report and literature review.pubmed.ncbi.nlm.nih.gov
98. Lipemic anterior chamber mimicking uveitis in severe hypertriglyceridemia: a case report and literature review.pubmed.ncbi.nlm.nih.gov
99. The effects of different prone ventilation strategies on mechanical power and respiratory mechanics in acute respiratory distress syndrome patients: a prospective, single-center observational study.pubmed.ncbi.nlm.nih.gov
100. Diagnostic Performance of 3.0-Tesla Magnetic Resonance Imaging for Pulmonary Nodules and Masses: A Comparative Cross-Sectional Study With Multidetector Computed Tomography.pubmed.ncbi.nlm.nih.gov
101. Automated CT-Based Quantification of Pulmonary Fibrosis Using Deep Learning-Based Lung Segmentation.pubmed.ncbi.nlm.nih.gov
102. Transoesophageal Ultrasound Assessment of Lung Aeration in Patients With Acute Respiratory Distress Syndrome.pubmed.ncbi.nlm.nih.gov
103. Different Methods to Improve the Monitoring of Noninvasive Respiratory Support of Patients with Severe Pneumonia/ARDS Due to COVID-19: An Update.pubmed.ncbi.nlm.nih.gov
104. The Diagnostic Value of Lung Ultrasound in Bronchopulmonary Dysplasia Among Preterm Infants with Gestational Age ≤ 28 Weeks.pubmed.ncbi.nlm.nih.gov
105. Pulmonary Veno-Occlusive Disease: A Focused Clinicopathologic Series.pubmed.ncbi.nlm.nih.gov
106. Usefulness of Bedside Point-of-care Ultrasounds in Intensive Care Unit for Septic Patients: A Consensus Statement of the Italian Society of Echocardiography and Cardiovascular Imaging.pubmed.ncbi.nlm.nih.gov
107. Deep learning-based quantitative CT assessment of interstitial lung abnormalities: prognostic risk thresholds in a health screening population.pubmed.ncbi.nlm.nih.gov
108. Tips and Tricks in Thoracic Radiology for Beginners: A Findings-Based Approach.pubmed.ncbi.nlm.nih.gov
109. [Update in Diagnosis of Idiopathic Pulmonary Fibrosis and Interstitial Lung Abnormality].pubmed.ncbi.nlm.nih.gov
110. Semi-quantitative assessment of paraspinal muscle fat infiltration in single-level C5-6 cervical spondylosis using gray-level thresholding on conventional MRI: associations with disc degeneration and posture-related segmental angular change.pubmed.ncbi.nlm.nih.gov
111. Understanding the Facet Joint Fusion Process: A Narrative Review for Clinicians and Surgeons Addressing the Who, Why, What, When, Where, Which, and How.pubmed.ncbi.nlm.nih.gov
112. Uniportal non-coaxial endoscopic posterior cervical discectomy with annular suture repair for C6/C7 disc herniation: a case report.pubmed.ncbi.nlm.nih.gov
113. Non-Resolving Repair in Idiopathic Pulmonary Fibrosis: From Failed Cellular Transitions to Architectural Lock-In.pubmed.ncbi.nlm.nih.gov
114. Beyond Acute Infection: A Conceptual Framework Linking Zoonotic Bacterial Pathogens to Pulmonary Fibrosis and Lung Carcinogenesis.pubmed.ncbi.nlm.nih.gov
115. Intermediate-Phenotype ABCA3 Deficiency Caused by Compound Heterozygous Variants Presenting as Persistent Respiratory Failure and Systemic Hypertension Since Birth in a Term Infant: A Case Report.pubmed.ncbi.nlm.nih.gov

Eğitim amaçlıdır; hasta başında tanı ve tedavi kararının yerine geçmez. İçerik yapay zekâ destekli bir süreçle güncel literatüre göre cümle cümle kaynaklarla karşılaştırıldı, ancak uzman radyolog incelemesinden geçmedi. Klinik kararlarda güncel kılavuzları, kurum protokollerini ve radyoloji raporunu esas alın.