Gammex 610新生兒胸部模體，Gammex 610胸部模體
質(zhì)量控制數(shù)字X射線和CT

Gammex 610新生兒胸部模體是專為計(jì)算機(jī)和數(shù)字X線攝影系統(tǒng)的日常質(zhì)量保證監(jiān)測而設(shè)計(jì)的。由于模體復(fù)制了真實(shí)新生兒的解剖結(jié)構(gòu)和組織衰減特征，因此可以使用臨床協(xié)議對模體進(jìn)行成像，從而對整個成像鏈進(jìn)行測試，包括圖像處理參數(shù)。

Gammex 610新生兒胸部模體是第一個在其傳播特性，直方圖，物理尺寸和結(jié)構(gòu)上足以代表1-2公斤新生兒的擬人新生兒模體。因此，可以使用適當(dāng)?shù)呐R床參數(shù)對其進(jìn)行成像以提供圖像一致性隨時間的測量。

Gammex 610新生兒胸部模體還包含臨床相關(guān)的圖像質(zhì)量挑戰(zhàn)的解決方案和模擬肺氣胸胸膜增厚的肺形式的噪聲和模擬肺透明膜病肺。

Gammex 610新生兒胸部模體滿足了國際和國家標(biāo)準(zhǔn)組織（如IPEM和AAPM）對計(jì)算機(jī)和數(shù)字X線攝影的全面質(zhì)量保證計(jì)劃的認(rèn)可，解決了患者暴露和圖像質(zhì)量的兩個主要問題?；颊叩恼丈涫且粋€問題，因?yàn)橛?jì)算機(jī)和數(shù)字化射線照相設(shè)備將過度曝光的圖像縮放到合適的光密度。通常被稱為“劑量蠕變”的結(jié)果在兒科成像中特別相關(guān)，其中一些患者每天被多次射線照相。

圖像質(zhì)量的評估由于計(jì)算機(jī)和數(shù)字射線照相系統(tǒng)使用被射線照相的解剖學(xué)的先驗(yàn)知識來處理和顯示圖像的方式而變得復(fù)雜。圖像質(zhì)量可能因參數(shù)選擇不當(dāng)而降低。參數(shù)選擇對圖像質(zhì)量的影響只能通過使用復(fù)制人體解剖結(jié)構(gòu)的模型來評估。

Gammex 610新生兒胸部模體特別適合作為確保盡可能低的曝光水平的工具，仍然保持診斷圖像質(zhì)量。

新生兒胸部模體Gammex 610

Neonatal Chest Phantom Gammex 610
Quality Control for Digital X-Ray & CT

 Neonatal Chest Phantom GAMMEX 610
The Gammex 610 Neonatal Chest Phantom is designed for routine quality assurance monitoring of computed and digital radiography systems. 　Because the phantom replicates both the anatomic structure and the tissue attenuation　characteristics of a real neonate, the phantom can be imaged using clinical protocols resulting in a test of the entire imaging chain, including image processing parameters.

The Gammex 610 is the first anthropomorphic neonatal phantom that sufficiently represents a 1-2 kg neonate in its transmission characteristics, histogram, physical size and structure. 　 As such, it can be imaged using the　appropriate clinical parameters to provide a measure of image consistency over time.

The phantom also contains clinically relevant image quality challenges for resolution and noise in the form of a lung with simulated pneumothorax with pleural thickening, and a lung with simulated hyaline membrane disease.

The Gammex 610 Neonatal Chest Phantom answers a recognized need by both international and national standards groups such as IPEM and AAPM for a comprehensive quality assurance program for computed and digital radiography addressing the two major concerns of　patient exposure and image quality. Patient exposure is a concern because computed and digital radiographic equipment will scale the over exposed images to the proper optical density. The result, often referred to as "Dose Creep" is especially relevant in pediatric imaging where some patients are radiographed several times per day.

Evaluation of　image quality is complicated by the way in which computed and digital radiographic systems use a-priori knowledge of anatomy being radiographed to　process and display the image. Image quality can be degraded through improper parameter selection. The effect of parameter selection on image quality can only　be assessed by using a phantom that replicates the human anatomy.

The Gammex 610 phantom is specially suited as a tool for establishing the lowest possible exposure level that still maintains diagnostic image quality.