Zaliman Sauli
Thumbnail Image
Preferred name
Zaliman Sauli
Official Name
Zaliman, Sauli
Alternative Name
Sauli, Zaliman B.
Sauli, Zaliman
Sauli, Z.
Main Affiliation
Scopus Author ID
24554644300
Researcher ID
FWC-2779-2022

Research Output

Filters

4
2
4
Reset filters

Settings
Now showing 1 - 4 of 4
  • Publication
    Digital fringe projection system for round shaped breast tumor detection
    ( 2020-01-01)
    Norhaimi W.M.W.
    ;
    Zaliman Sauli
    ;
    Aris H.
    ;
    Retnasamy V.
    ;
    Vairavan R.
    ;
    Aziz M.H.A.
    The digital fringe projection has been widely used in the field of surface imaging however its application in the field of body imaging especially for human breasts is still quite limited. Currently, the common imaging modality for breast tumor diagnoses are breast ultrasound and mammogram. There are advantages and limitations of using the mammogram and ultrasound in terms of the procedure of the process and the non-invasive nature of the procedure. In this work, an automated digital fringe projection system is developed to execute the imaging of surface changes of a helical shaped phantom breast. The fringe projection setup utilizes a computer, LCD projector, and a CCD camera. The tumor used was round-shaped with a diameter size of 1.5 and 2 cm. The fringe pattern was projected through the three-step phase shift where a resulting phase map was obtained. Results demonstrated that the system was able to identify an average pixel shift of five and ten on the breast surface caused by the presence of the round breast tumors.
      1
  • Publication
    Assessment of stress and strain on women's breast tissue caused by single round malignant tumor
    ( 2020-01-08)
    Nazri N.N.A.
    ;
    Aris H.
    ;
    Zaliman Sauli
    ;
    Norhaimi W.M.W.
    Breast cancer is one of the most common cancer and the leading cause of death among women. In the past, the simulation approach has been used to study, analyze and improve breast cancer early detection. Although there have been simulation work related to identifying breast tumors, most of these simulation work required an image from a breast imaging modality such as the Magnetic Resonance Imaging (MRI) for image segmenting purposes. Minimal simulation work was done to assess the stress and strain of a women's breast tissue caused by the presence of a tumor without the use of an image obtained from a breast imaging modality. In this study, three main layers of the breast which are the glandular, fat tissue and skin are used as the underlying breast tissue material with the malignant tumor. The women's breast geometry design was executed with Salome software where the elasticity simulation based on Youngs Modulus was executed with the Elmer Finite Element Analysis Method (FEAM) software. The analysis was based on the effects of stress and strain of women's breast tissue for each of the glandular, fat tissue and skin with an increase of force from 1 N to 5 N exhibited by the malignant tumor. Results from the simulation have confirmed that the existence of the round malignant tumor within the breast tissue causes the stress and strain on the breast's tissue. The results have demonstrated that glandular tissue which has the highest material density experiences more stress and strain as the malignant tumor force increases with the highest stress and strained obtained at 3.30 Pa and strain at 2.11 × 10-7 respectively. The findings of this study have given a clear outcome regarding the relationship of stress and strain of breast material layers caused by a round malignant tumor within a breast.
      2
  • Publication
    Simulation and Investigation of Si-Based Piezoelectric Micromachined Ultrasonic Transducer (PMUT) Performances
    ( 2023-07-01)
    Hasnizah Aris
    ;
    Rosli M.N.B.
    ;
    Mohammad Nuzaihan Md Nor
    ;
    Zaliman Sauli
    ;
    Norhaimi W.M.W.
    Micro-electromechanical system (MEMS) based piezoelectric ultrasonic transducers for acoustic imaging of the surroundings are known as piezoelectric micromachined ultrasonic transducers (PMUTs). This research proposes a structural design of the PMUT with four fixed-guided beams. The beam is subjected to lateral loads, with vectors that are perpendicular to the longitudinal axis. This project simulated Piezoelectric Micromachined Ultrasonic Transducer (PMUT) with three different material properties i.e. Aluminium Nitride (AlN), Lead zirconate titanate (PZT) and Zinc Oxide (ZnO). Based on the study, it was found that reducing the beam dimensions and increasing the plate size will result in the first mode frequency reduction from 1.33x107 Hz to 3.74x106 Hz. Other than that, it was found that AlN PMUT experienced the maximum deflection of 6.3413 to 6.3478 µm when the loads applied in the range of 50 to 200 µN/m2. When the piezoelectric material changed to PZT, we obtained the maximum deflections of 0.3771 to 0.3786 µm when the same loads range applied to the PMUT. As for the ZnO PMUT, the maximum deflections obtained were in between 0.1702 µm to 0.1772 µm with the loads are maintained as in the loads applied to the AlN and PZT. This study proved the significant impact of altering the structural dimensions and material properties of PMUTs on their operational characteristics, specifically the first mode frequency and deflection behavior.
      1
  • Publication
    Fringe projection phase shift variance effects on breast height imaging
    ( 2020-01-08)
    Norhaimi W.M.W.
    ;
    Zaliman Sauli
    ;
    Aris H.
    ;
    Retnasamy V.
    ;
    Mohd Faidz Mohamad Shahimin
    ;
    Vairavan R.
    Fringe projection has been garnering tremendous interest in the field of optical imaging. A wide range of surface measurement application including the medical application utilizes the fringe projection as means of surface metrology due to its non-invasive imaging modality. Although fringe projection has been applied in the medical field, minimal work has been conducted in the field of breast height imaging. In this work, a digital fringe projection system based on the phase shifting fringe projection is applied on a prosthetic tear drop breast. The fringe projection system consists of a digital projector, CCD camera and a computer. A phase shift variance of π/4, π/2 and 2π/3 from the fringe patterns are projected onto the breast sample using the three step phase shift fringe projection. The phase shift is varied to determine a suitable phase shift for the tear drop breast height imaging obtained from the phase map followed by the phase unwrapping process. The surface height profile obtained from the varied phase shift of the fringe projection system was compared to the height profile of the tear drop breast obtained from a direct method using the electronic digital vernier caliper. The results demonstrate that the fringe patterns phase shifted by 2π/3 produce a smooth phase map and unwrapped phase map which resulted in a clear and visible height profile of the tear drop breast with an almost identical height profile with the direct measurement method. The preliminary results from this study can be further extended to breast imaging with the presence of cancerous breast tumors.
      2