| 1. |
- Agren, B, et al.
(författare)
-
Radiography and bone scintigraphy in bone marrow transplant multiple myeloma patients
- 1997
-
Ingår i: Acta radiologica (Stockholm, Sweden : 1987). - : SAGE Publications. - 0284-1851 .- 1600-0455. ; 38:1, s. 144-150
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To compare conventional radiography and bone scintigraphy in relation to clinical outcome in bone marrow transplant multiple myeloma patients. Material and Methods: A total of 70 radiographies and 70 bone scintigraphies were compared in 35 patients. Results: The skull, the extremities, the iliac and pubic bones were better assessed with radiography. For new vertebral lesions and for lesions in the ribs and sternum, bone scintigraphy proved superior. For the sacrum, the methods were equal. When bone scintigraphy was used as a complement to radiography, 4% more pathological sites were found. No patient had both a normal radiography and a pathological bone scintigraphy, but 5 patients had both a normal bone scintigraphy and a pathological radiography. The results of the radiological examinations did not always correlate with the clinician's grading of the patient's disease. The radiological examinations had no prognostic value for the 7 patients examined on several occasions. Conclusion: The ability of conventional radiography and bone scintigraphy to disclose myeloma lesions varies, depending on location and size of the lesions. Radiography should remain the primary examination modality also for bone marrow transplant multiple myeloma patients. Bone scintigrapy can serve as a complement for investigating unexplained pain, e.g. caused by lesions in vertebrae or ribs.
|
|
| 2. |
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
- Agren, B, et al.
(författare)
-
MR imaging of multiple myeloma patients with bone-marrow transplants
- 1998
-
Ingår i: Acta radiologica (Stockholm, Sweden : 1987). - : SAGE Publications. - 0284-1851 .- 1600-0455. ; 39:1, s. 36-42
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: to evaluate the role of MR imaging in the examination of multiple myeloma (MM) patients with bone-marrow transplants Material and Methods: A total of 40 MR examinations were made of 20 patients: 33 examinations of the spine and pelvis in 20/20 patients; and 7 examinations of the femora in 5/20 patients. the 40 examinations were evaluated and the results compared with those found at radiography. Altogether 13/20 patients were re-examined: 10 after 1 year (1 patient twice); and 3 after 2 years. Five sequences were tested, 3 of them first without and then with i.v. contrast enhancement Results: in 24/33 examinations, active MM lesions were shown by MR. in 16/33 examinations, MR showed greater spread and detectability than radiography. in the 5/20 femoral patients, 3 had a peripheral red bone-marrow extension in the femora. in the 13 re-examinations, the lesions had spread in 4 patients, were unchanged in 7, and had decreased in 2. the lesions were easier to detect with the turbo inversion recovery (TIR) technique and with fat saturation than with the conventional spin-echo sequences. Contrast enhancement made the lesions more conspicuous in 8/17 examinations Conclusion: MR has the potential to be a useful routine examination with T1-weighted and TIR sequences of selected areas, and without the use of contrast enhancement. However, further longitudinal studies are necessary in order to evaluate its possible predictive value
|
|
| 6. |
- Danielsson, R, et al.
(författare)
-
Comparison of planar and SPECT scintimammography with 99mTc-sestamibi in the diagnosis of breast carcinoma
- 1999
-
Ingår i: Acta radiologica (Stockholm, Sweden : 1987). - : SAGE Publications. - 0284-1851 .- 1600-0455. ; 40:2, s. 176-180
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose: To compare results of planar and SPECT breast imaging with 99mTc-MIBI in detecting primary breast cancer. Material and Methods: Twenty-six consecutive patients with 34 suspected breast lesions underwent both planar and SPECT scintimammography. Ten minutes after injection of 700 MBq 99mTc-MIBI, 2 prone lateral projections were obtained, followed by a supine anterior projection. Forty minutes after injection, a SPECT study was done. All lesions were operated upon and verified with histopathology. Results: A sensitivity of 85% and specificity of 88% of planar scintimammography in diagnosis of primary breast lesions were achieved. The corresponding values for SPECT were 61% and 64%. Conclusion: The diagnostic accuracy of planar scintimammography was not improved by using SPECT imaging.
|
|
| 7. |
- Engelmark, O., et al.
(författare)
-
Ecological effects and management aspects of an exotic tree species : the case of lodgepole pine in Sweden
- 2001
-
Ingår i: Forest Ecology and Management. - 0378-1127 .- 1872-7042. ; 141:02-jan, s. 3-13
-
Tidskriftsartikel (refereegranskat)abstract
- The North American tree Pinus contorta var, latifolia was experimentally introduced in Sweden already in the 1920s, and has been used in Swedish forestry on a large scale since the 1970s. These plantations now cover 565,000 ha, mainly in the northern area. In this paper we summarize and discuss existing ecological knowledge of this species introduction. With regard to longterm sustainability we suggest management means to minimize harmful effects of the introduction on ecosystems. These include aspects of self dispersal, pests, ecosystem and landscape structures, and also ecological processes and biodiversity. We also focus on observed and possible interactions in the ecosystems. As Pinus contorta seeds are disseminated and trees regenerated outside initial plantations, this may have future bearings on biodiversity. We suggest a strategy which takes account of the uncertainty in predicting future ecological effects. The strategy includes areal restrictions and zones without Pinus contorta, but also to set up a monitoring program. Observations of adverse effects from the plantations would then give the possibility to adjust P. contorta management.
|
|
| 8. |
|
|
| 9. |
- Jansik, B., et al.
(författare)
-
Relativistic effects on linear and non-linear polarizabilities of the furan homologues
- 2003
-
Ingår i: Journal of Molecular Structure. - 0166-1280. ; 633:2-3, s. 237-246
-
Tidskriftsartikel (refereegranskat)abstract
- First principles calculations including relativistic effects are carried out for dipole moments, polarizabilities, first- and second-order hyperpolarizabilities for the series of furan homologues XC4H 4, X = O, S, Se, Te, at three different levels of theory, time-dependent Dirac-Hartree-Fock (DHF), time-dependent Hartree-Fock with a Douglas-Kroll transformed one-component Hamiltonian, and time-dependent Hartree-Fock using effective-core potentials. By comparison with the corresponding non-relativistic results, the influence of relativistic effects on the properties as well as the accuracy of previously reported calculations on these molecules using effective-core potentials for selenium and tellurium can be addressed. The obtained results indicate that relativistic effects can be described with comparable accuracy at all three employed levels, and that non-scalar effects, which are explicitly treated only at the time-dependent DHF level, are of minor importance. Frequency dispersion and relativity are found to be additive at the single-determinant level. We find that relativistic effects cannot make up for the earlier identified mismatch between theory and experiment for the non-linear polarizabilities of the heavier homologues. A Bishop-Kirtman analysis of vibrational effects indicates that the same can be said about these. © 2003 Elsevier B.V. All rights reserved.
|
|
| 10. |
|
|
