現代のSPECT/CT V/Qスキャン:プロトコル、真珠、落とし穴
Dale L Bailey1,2, Paul J Roach3,4
1Department of Nuclear Medicine, Royal North Shore Hospital, Sydney, Australia - dale.bailey@sydney.edu.au.
まとめ
60年の歴史を持つ肺シンチグラフィーは、現在、造影(V)と灌流(Q)イメージングを強化するためにSPECT/CTを使用しています。この高度な肺スキャンは、95%以上の症例で肺塞栓症(PE)を正確に診断します。
科学分野:
- 核医学
- 放射線科
- 肺医学
背景:
- 肺シンチグラフィーは、60年以上にわたり肺診断の基盤となってきました。
- 技術の進歩により、画像処理を改善するためにSPECT/CTを利用した断層撮影法へと変貌しました。
- 現代の肺スキャンは、テクネチウム-99m標識剤を使用して換気(V)と灌流(Q)を評価します。
研究 の 目的:
- 肺シンチグラフィーを洗練された診断ツールへと進化させることを強調すること。
- 肺塞栓症(PE)診断の精度向上におけるSPECT/CTの役割を強調すること。
- PE検出を超えて、機能評価や手術ガイダンスを含む肺スキャンの応用範囲を拡大することについて議論すること。
主な方法:
- 換気と灌流の両方の評価にSPECTイメージングを利用すること。
- 解剖学的な相関のために低線量CTとSPECTを統合すること。
- V/Qイメージングのためにテクネチウム-99m標識剤を使用すること。
主要な成果:
- SPECT/CTはPEに対する肺スキャンの感度と特異性を向上させます。
- 肺スキャンは現在、ガス交換のための地域的な肺機能とV/Qマッチングを評価しています。
- PEの診断精度は、わずかな不明瞭な報告で95%を超えています。
結論:
- 肺シンチグラフィー、特にSPECT/CTは、肺塞栓症の診断において依然として非常に効果的な診断ツールです。
- このモダリティの有用性は、地域的な肺機能の評価や介入のガイダンスにまで及びます。
- アーチファクトのような課題にもかかわらず、経験豊富な解釈は高い診断信頼性をもたらします。
関連する概念動画
Imaging Studies for Cardiovascular System V: CT
276
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
276
Radiological Investigation II: MRI and Ventilation Perfusion Scan
521
Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
521
Radiological Investigation III: Pulmonary Angiogram and PET Scan
400
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
400
Computed Tomography
8.0K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
8.0K
Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care
308
Diagnosing Pulmonary EmbolismDiagnosing pulmonary embolism (PE) involves clinical assessment and advanced imaging tests. The preferred diagnostic tool is the spiral (helical) CT scan or CT angiography (CTA), which uses intravenous contrast media to visualize the pulmonary vasculature and identify emboli.A ventilation-perfusion (V/Q) scan is an alternative for patients unable to receive contrast media. This scan includes both perfusion and ventilation scanning. Perfusion scanning involves...
308
Imaging Studies III: Computed Tomography
280
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
280


