There are investigations showed that the majority of prostate glands are more bullet-shaped than ellipsoid. Anteroposterior diameter (height) may be measured in two planes-axial and sagittal. Transverse diameter (width) is defined as the maximal transverse diameter at mid-gland level, while longitudinal diameter (length) is defined as the distance from the proximal external sphincter to the urinary bladder. Prolate ellipse volume (cc) = height (cm) × length (cm) × width (cm) × π/6. It is calculated according to the following formula: Prolate ellipse volume calculation is fast, precise and practical for clinical application. Three commonly used prostate volume measurement techniques in transrectal ultrasonography (TRUS) are planimetry calculation, prolate ellipse volume calculation, and an ellipsoid volume measurement technique. Of all the different methods for measuring prostate volume, transrectal ultrasound is the most accurate. Overall, knowing prostate volume is important for understanding and managing prostate health in men, both healthy and those with prostate conditions. For example, a large prostate usually means an increased risk of developing BPH or prostate cancer. Information on prostate volume can be used to predict the likelihood of future prostate problems.For example, a decrease in the prostate volume may indicate the effectiveness of the treatment. Prostate volume can be used to monitor the effectiveness of a medical treatment.For example, larger prostate volumes may be more challenging to treat with certain therapies, such as prostatectomy (surgical removal of the prostate gland). Prostate volume can help guide treatment decisions.Knowing the volume of the prostate helps diagnose and evaluate the severity of prostate conditions, such as benign prostatic hyperplasia (BPH), prostatitis and prostate cancer.These measurements can be useful for a number of reasons: Prostate volume can be measured using a variety of techniques including digital rectal examination (DRE), transrectal ultrasound (TRUS) and magnetic resonance imaging (MRI). It is located below the bladder and surrounds the urethra the tube through which urine and semen are expelled from the body. The prostate is a gland located in the male reproductive system that produces fluid that is a component of semen. For example, the right cylinder in Figure 3.(a) is generated by translating a circular region along the \(x\)-axis for a certain length \(h\text\) Every cross-section of the right cylinder must therefore be circular, when cutting the right cylinder anywhere along length \(h\) that is perpendicular to the \(x\)-axis.Prostate volume is an important factor in the evaluation and management of men’s health, particularly for conditions that affect the prostate gland. For now, we are only interested in solids, whose volumes are generated through cross-sections that are easy to describe. Cross-section.Ī cross-section of a solid is the region obtained by intersecting the solid with a plane.Įxamples of cross-sections are the circular region above the right cylinder in Figure 3.(a), the star above the star-prism in Figure 3.(b), and the square we see in the pyramid on the left side of Figure 3.11. Let us first formalize what is meant by a cross-section. Subsection 3.3.1 Computing Volumes with Cross-sections ¶ However, we first discuss the general idea of calculating the volume of a solid by slicing up the solid. For example, circular cross-sections are easy to describe as their area just depends on the radius, and so they are one of the central topics in this section. Generally, the volumes that we can compute this way have cross-sections that are easy to describe. We have seen how to compute certain areas by using integration we will now look into how some volumes may also be computed by evaluating an integral. Section 3.3 Volume of Revolution: Disk Method ¶ Power Series and Polynomial Approximation.First Order Linear Differential Equations.Triple Integrals: Volume and Average Value.Double Integrals: Volume and Average Value.Partial Fraction Method for Rational Functions.Open Educational Resources (OER) Support: Corrections and Suggestions.
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