摘要:
In a method and magnetic resonance apparatus to assist a person in the alignment of a medical instrument used by the person to conduct a minimally invasive procedure with the instrument introduced into a patient at an entrance point in a predetermined orientation, within the patient receptacle of a magnetic resonance device, measurement data are acquired with the magnetic resonance device to determine a current orientation of the instrument and/or an instrument guide, and the measurement data are evaluated to determine the current orientation. A deviation of the current orientation from the predetermined orientation is determined, and at least one acoustic signal is emitted depending on the deviation to assist the person in orienting the instrument.
摘要:
A PET examination which acquires a data record of the body of a patient is carried out during at least one embodiment of a method for acquiring measured data. On the basis of the measured values of the data record, at least one region of interest in the body of the patient is determined, in which at least one examination of at least one embodiment of a method is carried out.
摘要:
In a method and MR apparatus for the automatic segmentation of flow images acquired by magnetic resonance tomography for the depiction of tissue or organs traversed with fluid such as blood, at least one phase image of a selected region of the subject is acquired by magnetic resonance tomography, and fluid-traversed regions in the at least one phase image are automatically segmented.
摘要:
A fastening device is for anchoring a surgical or diagnostic medical aid in the tissue of a human or animal hollow organ. The fastening device includes an anchor head, which is configured to penetrate the tissue; a driving device for driving the anchor head into the tissue; and a trigger device to trigger the driving of the anchor head into the tissue.
摘要:
In a method and control apparatus for tracking a contrast agent using an imaging medical device a test bolus of a contrast agent is initially injected into an examination subject, followed by an injection of a main bolus at a time interval of &Dgr;ti. The arrival of the test bolus in the observation volume is chronologically determined by periodically repeated survey measurements. An image data measurement is started at a time interval &Dgr;tm subsequent to the detection of the test bolus, this time interval &Dgr;tm being defined according to the prescribed time interval &Dgr;ti.
摘要:
Systems and methods are provided for determining a synthetic electron density map based on at least one MR image dataset and based on at least one soft tissue image structure and one bone image structure determined in the synthetic electron density map. The soft tissue image structure and the bone image structure may be compared with the corresponding structures in the MR image dataset. From a correction of the first soft tissue image structure and/or of the bone image structure is based on the comparison, a corrected synthetic electron density map is determined.
摘要:
Automatic prostate localization in T2-weighted MR images facilitate labor-intensive cancer imaging techniques. Methods and systems to accurately segment the prostate gland in MR images are provided and address large variations in prostate anatomy and disease, intensity inhomogeneities, and artifacts induced by endorectal coils. A center of the prostate is automatically detected with a boosted classifier trained on intensity based multi-level Gaussian Mixture Model Expectation Maximization (GMM-EM) segmentations of the raw MR images. A shape model is used in conjunction with Multi-Label Random Walker (MLRW) to constrain the seeding process within MLRW.
摘要:
A method is disclosed for determining attenuation values for PET data of a patient. In at least one embodiment, the method includes detecting at least one accessory of a magnetic resonance imaging scanner and detecting the position and/or alignment of the accessory by way of an imaging measuring method; comparing the detected accessory with data from a database; and assigning an attenuation map, which is contained in the database, to attenuation values of the detected accessory and adapting the attenuation map to the detected position and/or alignment of the accessory.
摘要:
A method and system for detecting lymph nodes in multiple complementary magnetic resonance (MR) sequences is disclosed. Anatomical landmarks, such as blood vessels, are extracted in a first MR sequence, such as an MR angiography (MRA) image. A search area is defined in at least one second MR sequence, such as a T1 weighted VIBE image, based on the anatomical landmarks extracted the first MR sequence. Lymph nodes are then detected in the search area of the second MR sequence. The lymph nodes can be detected by segmenting the search area into homogenous regions and determining whether each region is a lymph node using feature analysis.
摘要:
A method and system for detecting lymph nodes in multiple complementary magnetic resonance (MR) sequences is disclosed. Anatomical landmarks, such as blood vessels, are extracted in a first MR sequence, such as an MR angiography (MRA) image. A search area is defined in at least one second MR sequence, such as a T1 weighted VIBE image, based on the anatomical landmarks extracted the first MR sequence. Lymph nodes are then detected in the search area of the second MR sequence. The lymph nodes can be detected by segmenting the search area into homogenous regions and determining whether each region is a lymph node using feature analysis.