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Methodology and evaluation of the renal arterial system.

Drewniak T, Rzepecki M, Juszczak K, Moczulski Z, Reczyńska K, Jakubowska M - Cent European J Urol (2013)

Bottom Line: A statistically significant correlation between parameters that described sub-trees was noticed.It was observed that the individual artery segments occupy a separate space in the kidney volume.The methodology has the potential to assist in presurgical planning based on branching patterns of the renal arterial system and corresponding pathology.

View Article: PubMed Central - PubMed

Affiliation: Department of Urology, Rydygier Memorial Hospital, Cracow, Poland.

ABSTRACT

Introduction: The broad range of medical images and image processing technologies are applied in urology. The aim was to propose methodology to assess three-dimensional (3D) arrangement of renal arterial tree and to build a statistical model for analyzing the layout of arteries in the sections of the kidney.

Methods: The series of kidney CT slices are analyzed using image processing procedures and further the 3D model of arterial systems is converted to a graph tree which includes information about features of the renal arterial system.

Results: The selected endocast was transformed to the form of the 3D connected tubes, further to the tree data structure and next analyzed. The information about 3D coordinates of the nodes, also branch length and diameter were stored. Renal arterial system of the considered kidney possessed 181 branches with 14 bifurcation levels. The number of branches was highest at the 9th bifurcation level. The mean length of the arterial branch on each bifurcation level was constant (6 mm). The branch diameters rapidly decreased after each bifurcation. The number of terminal branches increases up to 9th level where there are 19 terminal branches. The mean length of terminal arteries was 7.17 mm while the mean radius 0.46 mm. A statistically significant correlation between parameters that described sub-trees was noticed. It was observed that the individual artery segments occupy a separate space in the kidney volume.

Conclusions: The methodology has the potential to assist in presurgical planning based on branching patterns of the renal arterial system and corresponding pathology.

No MeSH data available.


Related in: MedlinePlus

Averaged segment length at respective bifurcation levels. Solid squares indicate the mean length of all vessel segments at a certain bifurcation level; vertical bars – minimum and maximum values; rectangles – lower and upper quartiles; horizontal line – median.
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Figure 0004: Averaged segment length at respective bifurcation levels. Solid squares indicate the mean length of all vessel segments at a certain bifurcation level; vertical bars – minimum and maximum values; rectangles – lower and upper quartiles; horizontal line – median.

Mentions: First the endocast was imaged using a high–resolution CT and processed by various specialized procedures to form the 3D connected tubes (Figure 1). Further such image was converted to the form of tree data structure (Figure 2), in which the information about coordinates (x, y and z) of the nodes and also branch lengths and diameters was stored. The volume of the convex hull circumscribed on the analyzed arterial tree was about 53.5 cm3, while the number of analyzed branches in the presented endocast was 181 with 14 bifurcation levels. The mean diameter of the artery in the tree root amounted to 4.58 mm, while the length – 6.03 mm. The number of branches was highest (n = 32) at the 9th bifurcation level (Figure 3). Figures 4 and 5 present, in the form of box–plot, the detailed descriptive statistic of the branch lengths and areas at respective bifurcation levels (the smallest observation, lower quartile, arithmetic mean, median, upper quartile, largest observation). It may be noticed that the mean length of the arterial branch on each bifurcation level was constant and amounted to approx. 6 mm. This conclusion did not regard the second or third level, in which the length was even 18 mm. The relevant dispersion of the branch length was observed. The branch diameters rapidly decreased after each bifurcation. The diameter of the main artery was approx. 4.58 mm and after the first division it was 4.26 mm and 3.60 mm. There was also noticed a relevant dispersion of the branched areas (RSD up to 80% at the 6th and 7th levels of the arterial tree).


Methodology and evaluation of the renal arterial system.

Drewniak T, Rzepecki M, Juszczak K, Moczulski Z, Reczyńska K, Jakubowska M - Cent European J Urol (2013)

Averaged segment length at respective bifurcation levels. Solid squares indicate the mean length of all vessel segments at a certain bifurcation level; vertical bars – minimum and maximum values; rectangles – lower and upper quartiles; horizontal line – median.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3936159&req=5

Figure 0004: Averaged segment length at respective bifurcation levels. Solid squares indicate the mean length of all vessel segments at a certain bifurcation level; vertical bars – minimum and maximum values; rectangles – lower and upper quartiles; horizontal line – median.
Mentions: First the endocast was imaged using a high–resolution CT and processed by various specialized procedures to form the 3D connected tubes (Figure 1). Further such image was converted to the form of tree data structure (Figure 2), in which the information about coordinates (x, y and z) of the nodes and also branch lengths and diameters was stored. The volume of the convex hull circumscribed on the analyzed arterial tree was about 53.5 cm3, while the number of analyzed branches in the presented endocast was 181 with 14 bifurcation levels. The mean diameter of the artery in the tree root amounted to 4.58 mm, while the length – 6.03 mm. The number of branches was highest (n = 32) at the 9th bifurcation level (Figure 3). Figures 4 and 5 present, in the form of box–plot, the detailed descriptive statistic of the branch lengths and areas at respective bifurcation levels (the smallest observation, lower quartile, arithmetic mean, median, upper quartile, largest observation). It may be noticed that the mean length of the arterial branch on each bifurcation level was constant and amounted to approx. 6 mm. This conclusion did not regard the second or third level, in which the length was even 18 mm. The relevant dispersion of the branch length was observed. The branch diameters rapidly decreased after each bifurcation. The diameter of the main artery was approx. 4.58 mm and after the first division it was 4.26 mm and 3.60 mm. There was also noticed a relevant dispersion of the branched areas (RSD up to 80% at the 6th and 7th levels of the arterial tree).

Bottom Line: A statistically significant correlation between parameters that described sub-trees was noticed.It was observed that the individual artery segments occupy a separate space in the kidney volume.The methodology has the potential to assist in presurgical planning based on branching patterns of the renal arterial system and corresponding pathology.

View Article: PubMed Central - PubMed

Affiliation: Department of Urology, Rydygier Memorial Hospital, Cracow, Poland.

ABSTRACT

Introduction: The broad range of medical images and image processing technologies are applied in urology. The aim was to propose methodology to assess three-dimensional (3D) arrangement of renal arterial tree and to build a statistical model for analyzing the layout of arteries in the sections of the kidney.

Methods: The series of kidney CT slices are analyzed using image processing procedures and further the 3D model of arterial systems is converted to a graph tree which includes information about features of the renal arterial system.

Results: The selected endocast was transformed to the form of the 3D connected tubes, further to the tree data structure and next analyzed. The information about 3D coordinates of the nodes, also branch length and diameter were stored. Renal arterial system of the considered kidney possessed 181 branches with 14 bifurcation levels. The number of branches was highest at the 9th bifurcation level. The mean length of the arterial branch on each bifurcation level was constant (6 mm). The branch diameters rapidly decreased after each bifurcation. The number of terminal branches increases up to 9th level where there are 19 terminal branches. The mean length of terminal arteries was 7.17 mm while the mean radius 0.46 mm. A statistically significant correlation between parameters that described sub-trees was noticed. It was observed that the individual artery segments occupy a separate space in the kidney volume.

Conclusions: The methodology has the potential to assist in presurgical planning based on branching patterns of the renal arterial system and corresponding pathology.

No MeSH data available.


Related in: MedlinePlus