乳癌輔助放射線治療におけるタトゥーを用いない方法:表面画像法と4点定位法の比較
C Lenci1, F De Felice1, M Tomaciello1
1Radiation Oncology, AOU Policlinico Umberto I, Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy.
まとめ
表面誘導放射線治療(SGRT)は、従来のタトゥーと比較して、右側乳癌放射線治療ポジショニングにおいて、より高い精度と再現性を提供します。この非侵襲的な方法は、患者の体験と治療精度を向上させます。
科学分野:
- 放射線腫瘍学
- 医用物理学
背景:
- 正確な患者ポジショニングは、右側乳癌における効果的な放射線治療(RT)に不可欠です。
- 従来のタトゥーベースのセットアップは、患者の苦痛を引き起こす可能性があり、精度が低い場合があります。
- 表面誘導放射線治療(SGRT)は、患者アライメントのための非侵襲的な代替手段を提供します。
研究 の 目的:
- 右側乳癌RTにおけるSGRTと従来のタトゥーベースのポジショニングの精度と再現性を比較すること。
- 2つのポジショニング方法間のセットアップ誤差と画分間変動を評価すること。
主な方法:
- SGRT(AlignRT)とタトゥーベースのポジショニングを52人の患者で比較した前向き単一施設クロスオーバー試験デザイン。
- コーンビームCTレジストレーションを使用したセットアップ誤差の定量化と統計分析(Shapiro-Wilk、t検定)。
主要な成果:
- SGRTは、タトゥーベースのポジショニングと比較して、すべての方向(縦方向、垂直方向、横方向)で有意に低い平均セットアップ誤差を示しました(縦方向と垂直方向でP < 0.001、横方向でP = 0.044)。
- SGRTは、画分間変動の減少と外れ値(>1 cm)の減少を示しました。
- SGRTでより優れたセットアップ安定性が観察されました。
結論:
- AlignRTを用いたSGRTは、右側乳癌放射線治療における患者ポジショニングの精度と再現性を向上させます。
- この非侵襲的な方法は、治療精度を向上させ、セットアップ変動を減らし、タトゥーをなくすことで患者の快適性を高めます。
- 結果を検証し、長期的な転帰を評価するために、さらなる研究が推奨されます。
関連する概念動画
The Sense of Self: Reflected Self-Appraisal and Social Comparison
56.1K
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
56.1K
Multiple Comparison Tests
4.5K
Multiple comparison test, abbreviated as MCT, is a post hoc analysis generally performed after comparing multiple samples with one or more tests. An MCT will help identify a significantly different sample among multiple samples or a factor among multiple factors.
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...
4.5K
Evolutionary Relationships through Genome Comparisons
7.0K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
7.0K
Comparison Between Electrical And Gravitational Forces
4.1K
There are four fundamental forces in nature: the gravitational force, the electromagnetic force, the strong nuclear force, and the weak nuclear force. To compare the numerical strengths of the first two, take two particles of the same kind. Since electrons are fundamental particles, they are a good example.
Since both are inverse square law forces, the distance gets canceled when the ratio of the two forces is considered. Instead, the ratio of the electrical and gravitational forces depends on...
Since both are inverse square law forces, the distance gets canceled when the ratio of the two forces is considered. Instead, the ratio of the electrical and gravitational forces depends on...
4.1K
Comparison between RL and RC circuits
6.2K
An RC circuit consists of resistance and capacitance, while in an RL circuit, capacitance is replaced by an inductor. RL and RC circuits are first-order differential circuits that store energy. An RC circuit stores energy in the electric field, while an RL circuit stores energy in the magnetic field. When connected to a battery, an RC circuit charges the capacitor, causing the current to decrease from maximum to zero upon being fully charged. This increases the voltage across the capacitor from...
6.2K
Surface Tension and Surface Energy
3.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.3K


