摘要:
A system, computer program product, and related methods are described for obtaining, processing, and/or and archiving full-field breast image data, such as full-field breast ultrasound (FFBU) data, in a manner that promotes ready integration with current x-ray mammogram-based breast cancer screening methodologies, and which can alternatively be used to support a full-field-only environment. Two-dimensional thick-slice images computed from a three-dimensional data volume are used to facilitate efficient archiving for a breast imaging session, the two-dimensional thick-slice images corresponding to slab-like subvolumes of the breast. Clinician data overload problems that can arise from the existence of large amounts of three-dimensional full-field breast image data are reduced. Archive space is also preserved while still providing sufficient information data for future reference purposes. Related adjunctive full-field workflow methods are also described. The described embodiments are applicable to FFBU imaging and other full-field breast imaging modalities such as MRI, CT, PET, and others.
摘要:
Systems, methods, and related computer program products for non-invasive NIR spectrophotometric (NIRS) monitoring of total blood hemoglobin levels and/or other blood constituent levels based on a hybrid combination of phase modulation spectrophotometry (PMS) and continuous wave spectrophotometry (CWS) are described. PMS-based measurements including both amplitude and phase information used in the determination of a non-pulsatile component of an absorption property for each of at least three distinct wavelengths are processed to compute PMS-derived intermediate information at least partially representative of a scattering characteristic. CWS-based measurements including amplitude information is processed in conjunction with the PMS-derived intermediate information to compute a pulsatile component of the absorption property. A metric representative of at least one chromophore level, such as the total blood hemoglobin level, is computed from the pulsatile component of the absorption property at the at least three wavelengths and displayed on an output display.
摘要:
Automated ultrasonic scanning of a chestwardly compressed breast of a supine patient uses a scanning assembly that moves down to compress the breast through a membrane that is secured to the assembly across a bottom opening. A motorized ultrasound transducer moves across the breast while the breast remains downwardly compressed against the patient's chest, sending and receiving ultrasound energy through the membrane. The membrane is porous with respect to an acoustic coupling liquid that impregnates it. The transducer outputs ultrasound information that is processed to form initial planar images and then reconstructed slice images of breast tissue.
摘要:
Systems, methods, and related computer program products for ultrasonic examination of a tissue volume, such as a human breast, are described. A handheld volumetric ultrasound scanning probe, which is characterized by a two-dimensional scan area with a substantially rigid cap extending across the two-dimensional scan area, is provided with a texturably couplant-porous material sheet covering the substantially rigid cap over at least a portion of the two-dimensional scan area. The texturably couplant-porous material sheet facilitates positional stability of the handheld volumetric ultrasound scanning probe while positioned against a skin surface of the tissue volume. Advantageously, while the texturably couplant-porous material sheet brings about a more stable physical interface at the skin surface, the texturably couplant-porous material sheet brings about little or no degradation in acquired image quality. Also described are systems and related methods for elastography imaging using the handheld volumetric ultrasound scanning probe.
摘要:
Displaying breast ultrasound information on an interactive user interface is described, the user interface being useful in adjunctive ultrasound mammography environments and/or ultrasound-only mammography environments. Bilateral comparison is facilitated by a pairwise display of thick-slice images corresponding to analogous slab-like subvolumes in the left and right breasts. Coronal thick-slice imaging and convenient navigation on and among coronal thick-slice images is described. In one preferred embodiment, a nipple marker is displayed the coronal thick-slice image representing a projection of a nipple location thereupon. A convenient breast icon is also displayed including a cursor position indicator variably disposed thereon in a manner that reflects a relative position between the cursor and the nipple marker. Preferably, the breast icon is configured to at least roughly resemble a clock face, the center of the clock face representing the nipple marker location. Bookmark-centric and CAD-marker-centric navigation within and among thick-slice images is also described.
摘要:
An apparatus and related methods for scanning a breast are described, the apparatus comprising a frame defining an orifice shaped to allow the breast to be received therein, a compressive member secured to the frame across the orifice that compresses the received breast toward the patient's chest wall, and a transducer positioned in acoustic communication with the compressive member for imaging the breast therethrough. The frame holds a reservoir of acoustically conductive fluid that maintains the transducer in acoustic communication with the compressive member. In different preferred embodiments having different advantages, the compressive member comprises a flexible elastic membrane, a flexible inelastic membrane, or a rigid sonolucent plastic preformed into the shape of a chestwardly-compressed breast. Where the transducer comprises one or more linear array probes, various probe orientations and trajectories are described for generating a three-dimensional volumetric representation of the breast having reduced nipple shadow effects.
摘要:
Method and related apparatuses are described for performing automated ultrasound mammography with reduced nipple shadow effects. The breast is compressed in a direction generally toward the chest wall of the patient with one side of a compressive member which is preferably a membrane. The breast is scanned with an ultrasonic transducer array positioned in acoustic communication with the other side of the membrane. Beamsteering is used. The signals from the beamsteered energy are combined to generate one or more compound images having a reduced nipple shadow effect. An acoustic couplant is preferably applied between the breast and the membrane. The images of the sub-nipple region are also preferably enhanced by making comparisons with reference areas of the breast in areas away from the nipple shadow effected area. The images are preferably displayed to a user, either automatically or upon receiving a preference from the user.
摘要:
An x-ray system acquires an initial low-contrast, wide latitude (G=2.5, or G=2 or less) x-ray image of a breast. A processing system automatically finds suspected abnormalities in the breast by processing the low contrast initial image, and then automatically converts the initial x-ray image to a high-contrast, narrow latitude image at the locations of the found abnormalities to thereby facilitate diagnosis and patient care. The technology includes effective ways to produce, process and display the various images, and can be extended to other types of images.
摘要:
Tomographic images are obtained at a plane of interest by taking a series of x-ray exposures, producing a series of multiple images therefrom, arranging these multiple images so that points residing within a desired plane of interest are coincident to form a first order clarified image, repeating the step for a predetermined number of other planes which are parallel to the first plane of interest, to produce a first order clarified image for each of these planes, and then producing a smeared image for each of such planes, except one, by replicating the first order image for said plane a predetermined number of times and shifting each of the replicated images in the plane as a function of the distance between that particular plane and the x-ray source, the distance between that particular plane and the x-ray image device, the same distances but taken relative to a plane of interest, and the distance moved between exposures by the x-ray source. This smeared image for each particular plane is then multiplied by a coefficient and subtracted from the first order image of the plane of interest to form a second order clarified image of the plane of interest.
摘要:
A panel shaped, proximity type, x-ray image intensifier tube for medical x-ray diagnostic use having all linear components and yet a high brightness gain, in the range of 500 to 20,000 cd-sec/m.sup.2 -R, the tube being comprised of a rugged metallic tube envelope, an inwardly concave, iron, nickel, chromium alloy input window, a full size output display screen, a halide activated alkaline-halide scintillator photocathode screen suspended on insulators within the envelope and in between the input window and the output screen, and a high Z glass output window to reduce x-ray backscatter inside and outside of the tube. The tube can be used in a direct view, photofluorographic mode, in a radiographic camera system and with a remote view T.V. system.