深圳灣邊貿(mào)易供應Magphan®MR Performance Phantoms.，Magphan SMR100模體
SMR100模體參數(shù)：磁共振性能檢測模體，丙烯酸材料的圓柱形模體和球形模體，內(nèi)徑20cm，模體內(nèi)部加注硫酸銅溶液，檢測空間分辨率(高分辨率)、密度分辨率(低對比度)、測信躁比、T1,T2值、幾何線性等參數(shù)。 SMR100模體包括20cm的球形殼體、10cm的立方體試塊。
美國廠家：The Phantom Laboratory美國模體實驗室具體信息如下：
產(chǎn)品概況:
? 用途：主要用于MRI性能測試；
? 材質(zhì)：內(nèi)徑20cm丙烯酸材料的圓柱形模體和球形模體，模體內(nèi)部加注硫酸銅溶液；
? 檢測參數(shù)：空間分辨率(高分辨率)、密度分辨率(低對比度)、測信躁比、T1,T2值、幾何線性等；
? 方法：頭/身軀復合性能測量模體，測量均勻性、噪聲、水當量值、圖象一致性.
Cylindrical and Spherical Magphans®
Precise, Comprehensive Testing of MRI Scanners
Magphan® Phantoms are designed to perform a wide range of precision performance evaluations of Magnetic Resonance Imaging (MRI) Scanners.
The design criteria for the Magphan® phantoms are based on physicist, Dr. David Goodenough's extensive experience with MRI system evaluation and his well documented research into the quantification of image system performance tests. The test objects that make up the current Magphan® models embody two decades of scientific evaluation and field experience.
The Magphan®'s patented spherical design combines precise alignment of spherical geometry with cubic geometry. As magnetic field characteristics are mapped according to spherical harmonics, natural magnetic fields extend to diagonally symmetric volumes (DSVs), or spheres. This symmetry is the reason the AAPM Task Group's Report number 6a, titled "Acceptance Testing of Magnetic Resonance Imaging Systems," stated, "The sperical shape is recommended for reasons of symmetry." Imaging performance is evaluated in the transaxial, coronal, sagittal and oblique planes by rotating the sphere.
The Magphan® is also available with a conventional cylindrical housing for test groups and manufacturers who prefer the conventional cylindrical shaped phantoms.
Spherical Magphan® (SMR100) is a urethane sphere composed of two hemispherical shells with an inner diameter of 20cm.
· The shells are connected with a simple threaded flange connecting ring. The test cube assembly can be quickly removed without tools for greater imaging flexibility and easy access for cleaning and maintenance.
Cylindrical Magphan® (SMR170) has a removable end plate for internal access. The acrylic cylinder has an outer diameter of 20cm and an inner diameter of 19cm.
Tests - Summary
spatial uniformity
· signal-to-noise ratio (SNR)
· spherical geometry
· in-vitro sample testing
· geometric distortion (spatial linearity)
· pixel (matrix) size verification
· scan slice width and contiguity
· verification of patient alignment system
· spatial resolution up to 11 line pairs per cm (0.45mm resolution)
· low contrast sensitivity
· T1 and T2 measurements
· evaluation of 3-dimensional volume reconstruction
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Stock #
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Description
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SMR100
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Magphan® 100 including 20cm spherical housing,
10cm test cube and case
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SMR140
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Magphan® 140 - 10cm sphere with support disk
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SMR170
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Magphan® 170 including 20cm cylindrical housing,
10cm test cube and case
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SMR172
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Magphan® 172 including 20cm spherical housing,
20cm cylindrical housing, 10cm test cube and cases.
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源自：深圳市灣邊貿(mào)易有限公司
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