Search Results - "Alakuijala, J."

A 3D pencil-beam-based superposition algorithm for photon dose calculation in heterogeneous media by Tillikainen, L, Helminen, H, Torsti, T, Siljamäki, S, Alakuijala, J, Pyyry, J, Ulmer, W

“…In this work, a novel three-dimensional superposition algorithm for photon dose calculation is presented. The dose calculation is performed as a superposition…”
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Determination of parameters for a multiple-source model of megavoltage photon beams using optimization methods by Tillikainen, L, Siljamäki, S, Helminen, H, Alakuijala, J, Pyyry, J

“…Accurate modelling of the radiation output of a medical linear accelerator is important for radiotherapy treatment planning. The major challenge is the…”
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SU‐FF‐T‐83: Algorithm for Optimizing Beam Angles in IMRT Treatment Planning by Pesola, K, Alakuijala, J, Helminen, H, Siljamäki, S

“…Purpose: The goal of beam angle optimization in external radiation therapy treatment planning is to find field directions which shall result in an optimal…”
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Ultrasound-controlled neuronavigator-guided brain surgery by KOIVUKANGAS, J, LOUHISALMI, Y, ALAKUIJALA, J, OIKARINEN, J

“…The development of a unique neurosurgical navigator is described and a preliminary series of seven cases of intracerebral lesions approached with the…”
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Evidence for a functional role of GABA receptors in the rat mature hippocampus by Alakuijala, Anniina, Alakuijala, Jyrki, Pasternack, Michael

“…Both gamma-aminobutyric acid (GABA)(C) receptor subunit mRNA and protein are expressed in the stratum pyramidale in the CA1 area of the adult rat hippocampus,…”
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388 Beam angle optimization for IMRT treatment planning by Pesola, K., Alakuijala, J., Helminen, H., Pyyry, J.

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Modeling neuronavigator kinematics by Helminen, H., Alakuijala, J., Oikarinen, J., Lonhisalmi, Y., Sallinen, S., Koivukangas, J.

“…A method for optimal modeling of the kinematics of a neuronavigator is presented. The model is obtained by measuring a large number of known points in…”
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Data driven MRI inhomogeneity correction by Alakuijala, J., Oikarinen, J., Louhisalmi, Y., Sallinen, S., Helminen, H., Koivukangas, J.

“…A data driven method for correcting low frequency inhomogeneity in magnetic resonance images is presented. Small variations within a tissue type are modeled…”
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Neurosurgical Navigation System by Louhisalmi, Y., Koivukangas, J., Alakuijala, J., Oikarinen, J., Keranen, T.

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Image feature based automatic correction of low-frequency spatial intensity variations in MR images by Koivula, Antero, Alakuijala, Jyrki, Tervonen, Osmo

“…An automatic method of compensating for low-frequency variations in magnetic resonance images is presented. Small variations within a tissue type are modelled…”
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Gipfeli - High Speed Compression Algorithm by Lenhardt, R., Alakuijala, J.

“…Gipfeli is a high-speed compression algorithm that uses backward references with a 16-bit sliding window, based on 1977 paper by Lempel and Ziv, enriched with…”
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Neuronavigator-guided cerebral biopsy by Koivukangas, J, Louhisalmi, Y, Alakuijala, J, Oikarinen, J

“…Neuronavigators are new dynamic interactive instruments that use on-line computers to orient imaging data to the surgical field and guide the neurosurgeon to…”
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Beam's light view: visualization of radiotherapy treatment planning fields on anatomic surfaces by Alakuijala, J., Laitinen, J., Helminen, H.

“…Presents a new method for visualizing planned radiation fields on anatomical and target volumes in radiotherapy treatment planning. Our texture mapping-based…”
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Testing brachytherapy treatment planning software by Jaske, U.-M., Alakuijala, J., Laitinen, J.

“…This paper describes the authors' experiences in the testing process of a safety critical complex medical system, a brachytherapy treatment planning system…”
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SomaVision: integrated radiotherapy treatment planning contouring and field setup workstation by Helminen, H., Sallinen, S., Laitinen, J., Alakuijala, J., Puurunen, H.

“…Presents the architecture of a radiotherapy contouring and field setup workstation as part of the information infrastructure of an oncological department. The…”
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Reconstruction of digital radiographs by texture mapping, ray casting and splatting by Alakuijala, J., Jaske, U.M., Sallinen, S., Hehminen, H., Laitinen, J.

“…Presents methods for reconstructing digital radiographs from a stack of CT slices. The authors' findings indicate that alpha blended texture mapping is the…”
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New efficient image segmentation algorithm: competitive region growing of initial regions by Alakuijala, J., Laitinen, J., Sallinen, S., Helminen, H.

“…Presents a new simple and efficient region growing algorithm and its superior results against the current medical region growing practice. The algorithm uses…”
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A high-speed, voxel data processing computer architecture by Sallinen, S., Alakuijala, J., Helminen, H., Laitinen, J.

“…A new high-performance computer architecture aimed at the computationally intensive applications of biomedical volume data processing is proposed. It features…”
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3D visualization of radiographs in brachytherapy by Laitinen, J., Alakuijala, J., Helminen, H., Sallinen, S.

“…Presents a new visualization technique for radiographs and other projection images used in radiotherapy treatment planning. Radiograph, patient anatomy, and…”
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Constant Z line texture mapping in interactive visualization of medical images by Helminen, H., Alakuijala, J., Laitinen, J., Sallinen, S.

“…Presents a simple and efficient method for 3D visualization of perspective-mapped 2D images. In medical image visualization, understanding the spatial…”
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